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A058409
Number of 4 X n nonnegative integer matrices with all column sums 3, up to row and column permutation.
+0
3
1, 3, 18, 92, 458, 1982, 7928, 28592, 95138, 292993, 845027, 2295322, 5915631, 14535676, 34224682, 77510148, 169459010, 358698558, 737106306, 1473867060, 2873564862
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified December 5 23:38 EST 2009. Contains 170428 sequences.
AT&T Labs Research
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