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A285790 Primes equal to a hexagonal number plus 1. 5
2, 7, 29, 67, 191, 277, 379, 631, 947, 1129, 1327, 2017, 2557, 2851, 4561, 4951, 5779, 6217, 8647, 9181, 12721, 13367, 14029, 15401, 16111, 17579, 20707, 21529, 22367, 24091, 24977, 31627, 36857, 37951, 42487, 43661, 44851, 47279, 53629, 58997, 64621, 66067 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Apart from the leading 2 the same as A176616. - R. J. Mathar, Apr 27 2017

Primes in A130883. - Omar E. Pol, Apr 27 2017

LINKS

Colin Barker, Table of n, a(n) for n = 1..1000

PROG

(PARI) pg(m, n) = (n^2*(m-2)-n*(m-4))/2 \\ n-th m-gonal number

maxk=300; L=List(); for(k=1, maxk, if(isprime(p=pg(6, k) + 1), listput(L, p))); Vec(L)

CROSSREFS

Cf. A000040, A000384, A002496, A055469, A285789, A285791, A176616, A285792.

Sequence in context: A162172 A274682 A181758 * A083016 A062064 A158024

Adjacent sequences:  A285787 A285788 A285789 * A285791 A285792 A285793

KEYWORD

nonn

AUTHOR

Colin Barker, Apr 26 2017

STATUS

approved

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Last modified October 14 09:25 EDT 2019. Contains 327995 sequences. (Running on oeis4.)