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A065574 Numbers k such that the first k senary digits found in the decimal expansion of Pi form a prime. 0
1, 4, 92, 762, 813 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..5.

MATHEMATICA

p = First[ RealDigits[ Pi, 10, 10^5]]; p = p[[ Select[ Range[10^5], p[[ # ]] == 0 || p[[ # ]] == 1 || p[[ # ]] == 2 || p[[ # ]] == 3 || p[[ # ]] == 4 || p[[ # ]] == 5 & ]]]; Do[ If[ PrimeQ[ FromDigits[ Take[p, n], 6]], Print[n]], {n, 1, 3000} ]

CROSSREFS

Sequence in context: A129434 A248041 A209984 * A113252 A003737 A265238

Adjacent sequences:  A065571 A065572 A065573 * A065575 A065576 A065577

KEYWORD

nonn,base

AUTHOR

Robert G. Wilson v, Dec 01 2001

STATUS

approved

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Last modified August 7 12:30 EDT 2022. Contains 355986 sequences. (Running on oeis4.)