A181409 - OEIS

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A181409

For the numbers n in A181408, these are the largest corresponding k such that 2^n-2^k-1 and 2^n-2^k+1 are twin primes.

2, 2, 6, 10, 18, 18, 41, 42, 74, 84, 64, 125, 109, 169, 108, 242, 142, 234, 288, 254, 380, 379, 281, 274, 326, 376, 625, 677, 1122, 1400, 1417, 1934, 1620, 2254, 3584, 3674, 3019, 3548, 6128, 6074

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..40.

CROSSREFS

Sequence in context: A127404 A292037 A184842 * A248800 A165941 A054227

Adjacent sequences: A181406 A181407 A181408 * A181410 A181411 A181412

KEYWORD

nonn

AUTHOR

Pierre CAMI, Jan 28 2011

STATUS

approved