Number of permutations of 1..n with number of rises (p(i+1)>p(i)) the same as number of rises in the inverse permutation
1, 2, 6, 22, 96, 492, 2952, 20588, 164990, 1497740, 15187692, 169974040
4 seqfan posts
Tue Nov 9 20:02:15 CET 2010 [seqfan] Re: A180388-A180389 pops up in unexpected place (Re: PS: Permutation Ascents )
Sun Nov 7 22:58:01 CET 2010 [seqfan] Re: A180388-A180389 pops up in unexpected place (Re: PS: Permutation Ascents )
Sun Nov 7 19:23:29 CET 2010 [seqfan] Re: A180388-A180389 pops up in unexpected place (Re: PS: Permutation Ascents )
Thu Oct 28 12:55:20 CEST 2010 [seqfan] A180388-A180389 pops up in unexpected place (Re: PS: Permutation Ascents )
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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