Number of connected permutations of [1..n] (those not fixing [1..j] for 0
1, 1, 3, 13, 71, 461, 3447, 29093, 273343, 2829325, 31998903, 392743957
2 seqfan posts
Sat Oct 1 10:25:43 CEST 2011 [seqfan] Re: more help needed in entering sequences
Wed Dec 29 15:36:54 CET 2010 [seqfan] A000698 == indecomposable fixed-point free involutions of {2n}?
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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