A037060 a(n)-th prime is the smallest prime containing exactly n 4's.

1, 13, 86, 603, 4620, 37299, 1533327, 22568442, 23574105, 210014510, 1893613727, 17241353173, 493582559244

Offset

0,2

Links

Table of n, a(n) for n=0..12.

Andrew R. Booker, The Nth Prime Page

Mathematica

(* see A037061 for f *) PrimePi[ Table[ f[n, 4], {n, 1, 12}]]

Crossrefs

Cf. A037061, A034388.

Sequence in context: A221338 A322720 A082036 * A348024 A000836 A157771

Adjacent sequences: A037057 A037058 A037059 * A037061 A037062 A037063

Keyword

nonn,base,hard

Author

Patrick De Geest, Jan 04 1999

Extensions

a(0)=1 prepended by Sean A. Irvine, Dec 06 2020

Status

approved