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The Earls sequence gives the starting position in the decimal digits of (or in general, any constant), not counting digits to the left of the decimal point, at which a string of
copies of the number
first occurs. The following table gives generalized Earls sequences for various constants, including
.
constant | OEIS | sequence |
Apéry's constant | A229074 | 10, 57, 3938, 421, 41813, 1625571, 4903435, 99713909, ... |
Catalan's constant | A224819 | 2, 107, 1225, 596, 32187, 185043, 20444527, 92589355, 3487283621, ... |
Champernowne constant | A224896 | 1, 34, 56, 1222, 1555, 25554, 29998, 433330, 7988888882, 1101010101010, ... |
Copeland-Erdős constant | A224897 | 5, 113, 1181, 21670, 263423, 7815547, 35619942, 402720247, 450680638 |
e | A224828 | 2, 252, 1361, 11806, 210482, 9030286, 3548262, 141850388, 1290227011 |
Euler-Mascheroni constant | A224826 | 5, 139, 163, 10359, 86615, 193446, 236542, 6186099, 36151186 |
Glaisher-Kinkelin constant | A225763 | 7, 14, 2264, 1179, 411556, ... |
golden ratio | A224844 | 2, 62, 158, 1216, 72618, 2905357, 7446157, 41398949, 1574998166 |
Golomb-Dickman constant | A225242 | 28, 256, 1967, 387, ... |
Khinchin's constant | A224836 | 9, 42, 1799, 494, 5760, ... |
natural logarithm of 2 | A228242 | 4, 419, 2114, 3929, 38451, 716837, 6180096, 10680693, 2539803904 |
natural logarithm of 10 | A228243 | 20, 111, 56, 9041, 4767, 674596, 24611354, 64653957, 131278082 |
pi | A061073 | 1, 135, 1698, 54525, 24466, 252499, 3346228, 46663520, 564665206 |
Pythagoras's constant | A224871 | 2, 114, 1481, 3308, 72459, 226697, 969836, 119555442, 2971094743 |
Soldner's constant | A229071 | 3, 42, 178, 10013, 31567, ... |
Theodorus's constant | A224874 | 27, 215, 1651, 2279, 21640, 176497, 7728291, 77659477, 638679423 |
Note that the 20-digit sequence does not occur in the first
digits of
, nor in fact do any of the
-digit sequences
for any two-digit number
with
and
(E. W. Weisstein, Jul. 20, 2013).
REFERENCES:
Anderson, D. "The Pi-Search Page." http://www.angio.net/pi/piquery.
Pickover, C. A. The Mathematics of Oz: Mental Gymnastics from Beyond the Edge. New York: Cambridge University Press, p. 338, 2002.
Sloane, N. J. A. Sequences A061073, A224819, A224826, A224828, A224836, A224844, A224871, A224874, A224896, A224897, A225242, A225763, A228242, A228243, A229074, and A229071 in "The On-Line Encyclopedia of Integer Sequences."
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للعاملين في الليل.. حيلة صحية تجنبكم خطر هذا النوع من العمل
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