A094875 Numbers k such that floor(10^k * Pi) is prime.

0, 1, 5, 37, 16207, 47576, 78072, 613372

Offset

1,3

Links

Table of n, a(n) for n=1..8.

Formula

a(n) = A060421(n) - 1.

Example

0 is a term because 3 is prime.
5 is a term because 314159 is prime.

Crossrefs

Cf. A060421, A089281, A000796.

Subsequence of A140515 and A231336.

Sequence in context: A081971 A350966 A086877 * A372839 A061674 A247709

Adjacent sequences: A094872 A094873 A094874 * A094876 A094877 A094878

Keyword

nonn,more

Author

Frederic E.D. Michaud (famillesmichaud(AT)hotmail.com), Jun 16 2004

Extensions

More terms from Johan Claes, Jun 16 2004

Definition changed to give terms instead of characteristic function by Andrew Howroyd, Nov 07 2025

Status

approved