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A011923 [ n(n-1)(n-2)(n-3)/13 ]. 0
0, 0, 0, 0, 1, 9, 27, 64, 129, 232, 387, 609, 913, 1320, 1848, 2520, 3360, 4393, 5649, 7155, 8944, 11049, 13504, 16347, 19617, 23353, 27600, 32400, 37800, 43848, 50593, 58089, 66387, 75544, 85617, 96664 (list; graph; refs; listen; history; internal format)
OFFSET

0,6

CROSSREFS

Sequence in context: A158926 A112524 A153237 * A029875 A129957 A198956

Adjacent sequences:  A011920 A011921 A011922 * A011924 A011925 A011926

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 13 10:20 EST 2012. Contains 205451 sequences.