A093707 - OEIS

A093707

Numbers n such that n^3 + (n-1)^2 is a prime.

3, 4, 6, 7, 13, 15, 18, 21, 27, 36, 37, 39, 40, 49, 51, 66, 67, 72, 73, 75, 81, 88, 90, 91, 97, 106, 108, 109, 114, 115, 120, 121, 123, 133, 135, 136, 138, 145, 147, 153, 156, 157, 159, 163, 168, 169, 186, 187, 201, 202, 208, 214, 222, 226, 231, 232, 237, 238, 249

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..59.

EXAMPLE

3^21 + 2^20 = 10461401779, which is prime.

MATHEMATICA

Select[ Range[ 250], PrimeQ[ #^3 + (# - 1)^2] &] (* Robert G. Wilson v, Jun 17 2004 *)

CROSSREFS

Sequence in context: A276783 A288731 A326422 * A058639 A253888 A289811

Adjacent sequences: A093704 A093705 A093706 * A093708 A093709 A093710