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A119424 Length of primes formed by the initial decimal digits of the base e expansion of Pi. 0
3, 18, 84, 373, 1410 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

EXAMPLE

a(1) = 3 because the first 3 digits of the base e expansion of Pi are 10.1 [meaning pi ~ 1*(e^1) + 0*(e^0) + 1*(e^-1)] and 101 (base 10) is prime.

a(2) = 18 because the first 18 digits of the base e expansion of Pi are 1, 0, 1010020200021111 which (base 10) is prime.

a(3) = 84 because there are 84 digits in 101010020200021111200201011200010102020001110120200101200020011011201012100100021001 which is prime.

CROSSREFS

Cf. A000040, A005042, A050948.

Sequence in context: A099012 A122069 A103897 * A301996 A218924 A037295

Adjacent sequences:  A119421 A119422 A119423 * A119425 A119426 A119427

KEYWORD

base,nonn

AUTHOR

Jonathan Vos Post, Jul 26 2006

STATUS

approved

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Last modified July 26 20:56 EDT 2021. Contains 346300 sequences. (Running on oeis4.)