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A050284 a(n) is the starting position of the first occurrence of a string of (at least) n '5's in the decimal expansion of Pi. 13
4, 130, 177, 24466, 24466, 244453, 3517236, 168743355, 5050944965, 7644991298, 157675736216, 1618922020656, 7604259624808, 7604259624808 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
This sequence has a(4) = a(5) = A096759(5) < A096759(4). As can be seen from a(1) = 4 (referring to the '5' in 3.1415...), position p means the string starts at the p-th digit after the decimal point. - M. F. Hasler, Apr 13 2019
a(11) > 99*10^9. - Giovanni Resta, Oct 02 2019
a(15) > 22*10^12. - Dmitry Petukhov, Jan 29 2020
LINKS
Eric Weisstein's World of Mathematics, Pi Digits.
CROSSREFS
Cf. A096759 (variant), ...A050283, A050285... (analog for digits ..., 4, 6, ...).
Sequence in context: A299136 A117897 A001425 * A096759 A299367 A299931
KEYWORD
nonn,base,more
AUTHOR
EXTENSIONS
More terms from Colin Martin (cbmartin(AT)tpg.com.au), Mar 03 2002
Typo in a(10) corrected by Giovanni Resta, Oct 02 2019
a(11)-a(14) added by Dmitry Petukhov, Jan 12 2020
STATUS
approved

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)