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 A241723 Number of compositions of n into distinct parts with exactly four descents. 2
 1, 1, 2, 3, 5, 7, 67, 70, 132, 194, 315, 436, 674, 2046, 2401, 3948, 5669, 8582, 11784, 17312, 23187, 47121, 56974, 86078, 116892, 169282, 223496, 316211, 413133, 565423, 879530, 1111950, 1523112, 2042569, 2744398, 3588200, 4804470, 6199849, 8142059, 10485846 (list; graph; refs; listen; history; text; internal format)
 OFFSET 15,3 LINKS Alois P. Heinz, Table of n, a(n) for n = 15..1000 EXAMPLE a(20) = 7: [7,6,4,2,1], [8,5,4,2,1], [10,4,3,2,1], [8,6,3,2,1], [9,5,3,2,1], [6,5,4,3,2], [7,5,4,3,1]. CROSSREFS Column k=4 of A241719. Sequence in context: A237440 A237441 A171029 * A090717 A090715 A029976 Adjacent sequences: A241720 A241721 A241722 * A241724 A241725 A241726 KEYWORD nonn AUTHOR Alois P. Heinz, Apr 27 2014 STATUS approved

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Last modified August 15 05:59 EDT 2024. Contains 375172 sequences. (Running on oeis4.)