References to A007717

Number of symmetric polynomial functions of degree n of a symmetric matrix (of indefinitely large size) under joint row and column permutations. Also number of multigraphs with n edges (allowing loops) on an infinite set of nodes.
1, 2, 7, 23, 79, 274, 1003, 3763, 14723, 59663, 250738, 1090608, 4905430


7 seqfan posts

Tue Jun 21 22:41:48 CEST 2011    [seqfan] Re: Counting multigraphs
Tue Jun 21 02:01:37 CEST 2011    [seqfan] Re: Counting multigraphs
Tue Jun 21 01:25:39 CEST 2011    [seqfan] Re: Counting multigraphs
Tue Jun 21 01:09:18 CEST 2011    [seqfan] Re: Counting multigraphs
Tue Jun 21 01:03:20 CEST 2011    [seqfan] Re: Counting multigraphs
Tue Jun 21 00:47:20 CEST 2011    [seqfan] Re: Counting multigraphs
Tue Jun 21 00:32:03 CEST 2011    [seqfan] Counting multigraphs

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