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A088565 Primes p such that the p-th digit in the decimal expansion of Pi is 1. 1
2, 41, 139, 149, 199, 239, 251, 397, 433, 439, 443, 491, 569, 599, 641, 647, 661, 787, 853, 883, 1031, 1087, 1097, 1153, 1187, 1319, 1423, 1613, 1619, 1637, 1657, 1667, 1697, 1759, 1789, 2081, 2129, 2143, 2221, 2239, 2459, 2633, 2689, 2741, 2753, 2777 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The 2nd 1 in Pi is in the 2nd place of the digits 3,1,4,1,5,...

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Flatten[Position[RealDigits[Pi, 10, 2800][[1]], 1]], PrimeQ] (* Harvey P. Dale, May 05 2019 *)

PROG

(PARI) pizeros(n, d) = { default(realprecision, 5000); p = Pi; v = Vec(Str(p)); for(x=1, n, if(v[x] == Str(d) && isprime(x-1), print1(x-1", ")) ) }

CROSSREFS

Cf. A014976.

Sequence in context: A103335 A047936 A007533 * A090195 A287335 A212837

Adjacent sequences:  A088562 A088563 A088564 * A088566 A088567 A088568

KEYWORD

nonn,base

AUTHOR

Cino Hilliard, Nov 19 2003

STATUS

approved

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Last modified May 9 13:09 EDT 2021. Contains 343742 sequences. (Running on oeis4.)