A037066 a(n)-th prime is the smallest prime containing exactly n 7's.

1, 4, 59, 275, 4924, 58623, 506877, 4546755, 30224014, 87818618, 2836649805, 14748299309, 251285857122, 603200604933

Offset

0,2

Links

Table of n, a(n) for n=0..13.

Andrew R. Booker, The Nth Prime Page

Mathematica

(* see A037067 for f *) PrimePi[ Table[ f[n, 7], {n, 1, 12}]]

Crossrefs

Cf. A037067, A034388.

Sequence in context: A282040 A245827 A200048 * A113251 A183462 A093597

Adjacent sequences: A037063 A037064 A037065 * A037067 A037068 A037069

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