login
A037066
a(n)-th prime is the smallest prime containing exactly n 7's.
1
1, 4, 59, 275, 4924, 58623, 506877, 4546755, 30224014, 87818618, 2836649805, 14748299309, 251285857122, 603200604933
OFFSET
0,2
MATHEMATICA
(* see A037067 for f *) PrimePi[ Table[ f[n, 7], {n, 1, 12}]]
CROSSREFS
Sequence in context: A282040 A245827 A200048 * A113251 A183462 A093597
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