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A091956
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Number of increasing subsequences that can be made from the sequence of successive primes.
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1
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1, 2, 3, 5, 8, 14, 25, 40, 68, 105, 160, 245, 352, 508, 742, 1039, 1497, 2085, 2823, 3875, 5362, 7174, 9607, 12698, 16837, 25317, 38608, 56459, 79955, 111702, 159319, 232290, 326331, 460445, 651956, 897771, 1241982, 1699443, 2326219, 3130763, 4283977, 5671153, 7764404, 10359118, 13883187
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| See A091955 for the precise definition of increasing subsequence.
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EXAMPLE
| For n = 4 we take 2357 and find that the increasing subsequence are
2,3,5,7
2,3,57
2,357
23,57
2357
so a(4)=5
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CROSSREFS
| Cf. A091955.
Sequence in context: A108296 A072100 A104882 * A107480 A128021 A036241
Adjacent sequences: A091953 A091954 A091955 * A091957 A091958 A091959
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KEYWORD
| more,nonn,base
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AUTHOR
| Mohammed Bouayoun (bouyao(AT)wanadoo.fr), Mar 12 2004
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EXTENSIONS
| More terms from Sean A. Irvine (sairvin(AT)xtra.co.nz), Nov 22 2010
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