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A309343 Position of start of first occurrence of palindromic prime(n) after the decimal point in expansion of Pi. 0
6, 9, 4, 13, 94, 852, 1096, 393, 728, 1944, 858, 934, 5229, 25, 405, 631, 647, 1259, 416, 1853, 78246, 182558, 13736, 53100, 38835, 58726, 54516, 97930, 8827, 11000, 69516, 5795, 183115, 161674, 320336, 41934, 55891, 71399, 65195, 189109, 21045, 49012 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..42.

EXAMPLE

First occurrence of palindromic prime(5) = 11 starts at the 94th digit after the decimal point, hence a(5) = 94.

PROG

(SageMath)

def postionInPi(n):

  return str(N(pi, 2000000))[1:].find(str(n))

[ postionInPi(i) for i in A002385[0:200] ]

CROSSREFS

Cf. A002385, A037024, A000796, A014777.

Sequence in context: A216638 A110649 A037024 * A254276 A021939 A069864

Adjacent sequences:  A309340 A309341 A309342 * A309344 A309345 A309346

KEYWORD

nonn,base

AUTHOR

Hauke Löffler, Jul 24 2019

STATUS

approved

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Last modified March 31 19:37 EDT 2020. Contains 333151 sequences. (Running on oeis4.)