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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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified December 10 11:39 EST 2016. Contains 279001 sequences.