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Search: id:A067209
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A067209 Number of n X n 0..1 matrices with all row and column sums equal. +0
1
2, 4, 14, 140, 4322, 434542, 144109562, 165431317452 (list; graph; listen)
OFFSET

1,1
CROSSREFS

Sequence in context: A102449 A102897 A001527 this_sequence A134040 A061291 A000370

Adjacent sequences: A067206 A067207 A067208 this_sequence A067210 A067211 A067212

KEYWORD

nonn

AUTHOR

Ron Hardin (rhh(AT)cadence.com), Feb 20 2002

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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