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A134458
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First differences of A000043.
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3
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1, 2, 2, 6, 4, 2, 12, 30, 28, 18, 20, 394, 86, 672, 924, 78, 936, 1036, 170, 5266, 252, 1272, 8724, 1764, 1508, 21288, 41746, 24260, 21546, 84042, 540748, 102594, 398354, 140482, 1577952, 45156, 3951216, 6494324, 7529094
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Differences between exponents of Mersenne primes.
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MATHEMATICA
| A000043 = {2, 3, 5, 7, 13, 17, 19, 31, 61, 89, 107, 127, 521, 607, 1279, 2203, 2281, 3217, 4253, 4423, 9689, 9941, 11213, 19937, 21701, 23209, 44497, 86243, 110503, 132049, 216091, 756839, 859433, 1257787, 1398269, 2976221, 3021377, 6972593, 13466917, 20996011}; GetDiff[seq_List] := Drop[seq, 1] - Drop[seq, -1]; A134458 = GetDiff[A000043] (* From Vladimir Joseph Stephan Orlovsky, Jun 18 2011 *)
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CROSSREFS
| Mersenne primes (of form 2^p - 1 where p is a prime): A000668, A000043.
Sequence in context: A138565 A137316 A064851 * A193819 A182786 A009279
Adjacent sequences: A134455 A134456 A134457 * A134459 A134460 A134461
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KEYWORD
| nonn
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AUTHOR
| Alessio 'BiGAlex' Periloso (bigalex(AT)bigalex.it), Oct 26 2007
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EXTENSIONS
| Checked and extended by N. J. A. Sloane (njas(AT)research.att.com), Oct 29 2007
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