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A144974
Centered heptagonal prime numbers.
1
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
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
KEYWORD
nonn
AUTHOR
STATUS
approved