References to A061396

Number of "rooted index-functional forests" (Riffs) on n nodes. Number of "rooted odd trees with only exponent symmetries" (Rotes) on 2n+1 nodes.
1, 1, 2, 6, 20, 73, 281, 1124, 4618, 19387, 82765, 358245, 1568458, 6933765


1 seqfan posts

Sun Dec 21 04:28:08 CET 2008    [seqfan] Happy (1:(1:1)):(1:1) x ((1:1 x (1:1):1):1):1

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