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 A191617 Least number a such that (2^n+a)*2^n + 1 is a prime number 12
 0, 0, 1, 0, 4, 3, 12, 0, 1, 3, 6, 6, 16, 9, 4, 5, 3, 20, 6, 5, 4, 5, 21, 9, 16, 35, 6, 6, 18, 8, 28, 6, 46, 11, 39, 6, 3, 20, 22, 47, 93, 90, 13, 51, 27, 98, 34, 6, 12, 14, 21, 21, 49, 143, 18, 5, 58, 30, 37, 30, 6, 56, 16, 150, 72, 59, 12, 5, 34, 3, 28, 45 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 LINKS Pierre CAMI, Table of n, a(n) for n = 1..5000 MATHEMATICA Table[a = 0; While[! PrimeQ[(2^n + a)*2^n + 1], a++]; a, {n, 100}] (* T. D. Noe, Jun 11 2011 *) CROSSREFS Cf. A191618, A191619, A191620, A191621. Sequence in context: A072802 A093726 A126604 * A169704 A270094 A270736 Adjacent sequences:  A191614 A191615 A191616 * A191618 A191619 A191620 KEYWORD nonn AUTHOR Pierre CAMI, Jun 09 2011 STATUS approved

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Last modified June 24 18:46 EDT 2021. Contains 345419 sequences. (Running on oeis4.)