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A067221 Number of n X n 0..13 matrices with all row and column sums equal. 0
14, 196, 162722, 21592075596 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..4.

CROSSREFS

Sequence in context: A171288 A001023 A278476 * A072533 A041085 A124239

Adjacent sequences:  A067218 A067219 A067220 * A067222 A067223 A067224

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 20 2002

STATUS

approved

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Last modified October 21 23:02 EDT 2018. Contains 316431 sequences. (Running on oeis4.)