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A375303
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a(n) is the rank of row n of A130517 in a lexicographic permutation of [1, ..., n].
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0
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0, 1, 4, 20, 108, 678, 4848, 39264, 355920, 3575640, 39454560, 474501600, 6178566240, 86606881200, 1300352981760, 20821540239360, 354184575816960, 6378546460970880, 121243261343500800, 2425719783585369600, 50955334461183398400, 1121303792572973856000, 25795667534014525593600
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,3
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LINKS
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PROG
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(PARI) \\ uses functions a130517_row from A130517 and rank from A375302.
a(n) = rank(a130517_row(n))
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CROSSREFS
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KEYWORD
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nonn,new
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AUTHOR
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STATUS
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approved
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