A295052 - OEIS

A295052

Smallest b > n+2 such that n*b^n + 1 is a generalized Cullen prime with n > 1 and base b > n+2 or 0 if no such prime exists.

6, 10, 0, 8, 14, 30, 12, 14, 132, 42, 143, 60, 30, 22, 170, 30, 665, 198, 42, 200, 138, 104, 115, 34, 84, 0, 1740, 54, 403, 130, 150, 134, 58, 72, 111, 778, 204, 174, 1681, 108, 344, 178, 585, 86, 7426, 904, 133, 234, 63, 1376, 114, 108

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OFFSET

2,1

COMMENTS

No prime found for n = 4, 27, 64.

Record values: a(3)=10, a(7)=30, a(10)=132, a(12)=143, a(16)=170, a(18)=665, a(28)=1740, a(46)=7426, a(66)=19899, a(100)=21412, a(112)=52601.

LINKS

Table of n, a(n) for n=2..53.

CROSSREFS

Cf. A210339.

Sequence in context: A004075 A202951 A316633 * A343369 A052193 A347632

Adjacent sequences: A295049 A295050 A295051 * A295053 A295054 A295055

KEYWORD

nonn

AUTHOR

Pierre CAMI, Nov 13 2017

STATUS

approved