A133398 Numbers that are not Mersenne primes.

1, 2, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64

Offset

1,2

Comments

Numbers that are not in A000668.

Terms a(1) to a(2042) coincide with those of A138836, but then a(2043)=2047 <> A138836(2043)=2048.

Links

Table of n, a(n) for n=1..61.

Crossrefs

Cf. A000037, A014092. Mersenne primes: A000668.

Cf. A138836.

Sequence in context: A361825 A248962 A323455 * A138836 A175431 A059921

Adjacent sequences: A133395 A133396 A133397 * A133399 A133400 A133401

Keyword

easy,nonn

Author

Omar E. Pol, Nov 22 2007, Apr 05 2008

Status

approved