References to A000130

One-half the number of permutations of length n with exactly 1 rising or falling successions.
0, 0, 1, 2, 5, 20, 115, 790, 6217, 55160, 545135, 5938490, 70686805, 912660508


1 seqfan posts

Fri Oct 29 05:35:16 CEST 2010    [seqfan] Implementing first 500 sequences in Java

Index of A-numbers in seqfan: by ascending order    by month    by frequency    by keyword
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