A144974 Centered heptagonal prime numbers.

43, 71, 197, 463, 547, 953, 1471, 1933, 2647, 2843, 3697, 4663, 5741, 8233, 9283, 10781, 11173, 12391, 14561, 18397, 20483, 29303, 29947, 34651, 37493, 41203, 46691, 50821, 54251, 56897, 57793, 65213, 68111, 72073, 76147, 84631, 89041

Offset

1,1

Links

Table of n, a(n) for n=1..37.

Wikipedia, Centered heptagonal prime number

Mathematica

lst={}; Do[p=(7*n^2-7*n+2)/2; If[PrimeQ[p], AppendTo[lst, p]], {n, 6!}]; lst

Crossrefs

Sequence in context: A175730 A087765 A141971 * A144975 A087699 A054807

Adjacent sequences: A144971 A144972 A144973 * A144975 A144976 A144977

Keyword

nonn

Author

Vladimir Joseph Stephan Orlovsky, Sep 27 2008

Status

approved