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A133398 Numbers that are not Mersenne primes. 3
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 (list; graph; refs; listen; history; text; internal format)
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: A230581 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

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Last modified June 5 11:52 EDT 2020. Contains 334840 sequences. (Running on oeis4.)