A256160 Index of the n-th 9 in the first occurrence of a string of exactly n 9's in the decimal expansion of Pi.

6, 46, 2952, 17992, 19451, 768, 1722783, 36356650, 564665215, 20148132320, 27014073315, 897831316568, 10542036048463, 5758910552723

Offset

1,1

Comments

A048940 is 5, 44, 762, 762, 762, 762, 1722776, 36356642, 564665206, ... - Alonso del Arte, Mar 25 2015

Links

Table of n, a(n) for n=1..14.

Dave Andersen, The Pi-Search Page.

Formula

a(n) = A096763(n) + n. - Danny Rorabaugh, Mar 31 2015

Prog

(PARI) { default(realprecision, 20080); for (m = 1, 10, x = Pi; r = 0; for (n = 1, 20000, d = floor(x); x = (x-d)*10; if(d <> 9, if (r <> m, r = 0, print1(n-1, ", "); r = 0; break), r = r + 1)))}

Crossrefs

Cf. A048940, A096763, A256109.

Sequence in context: A015865 A276271 A145506 * A184725 A232495 A267233

Adjacent sequences: A256157 A256158 A256159 * A256161 A256162 A256163

Keyword

nonn,base,more

Author

Kival Ngaokrajang, Mar 16 2015

Extensions

a(10)-a(14) added using A096763 by Jinyuan Wang, Mar 30 2020

Status

approved