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Search: id:A001458
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| A001458 |
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Number of permutations of length n by subsequences.
(Formerly M5297 N2304)
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+0
2
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| 1, 49, 1513, 38281, 874886, 18943343, 399080475, 8312317976, 172912977525, 3615907795025, 76340522760097, 1631788075873114, 35378058306185002
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OFFSET
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7,2
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REFERENCES
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Baer, R. M.; Brock, P.; Natural sorting over permutation spaces. Math. Comp. 22 1968 385-410.
J. M. Hammersley, A few seedings of research, in Proc. Sixth Berkeley Sympos. Math. Stat. and Prob., ed. L. M. le Cam et al., Univ. Calif. Press, 1972, Vol. I, pp. 345-394.
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CROSSREFS
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A row of A047874.
Sequence in context: A012238 A036226 A032655 this_sequence A004374 A069327 A088068
Adjacent sequences: A001455 A001456 A001457 this_sequence A001459 A001460 A001461
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KEYWORD
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nonn
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AUTHOR
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njas
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