A067216 Number of n X n 0..8 matrices with all row and column sums equal.

9, 81, 18081, 264639729, 239657412990669, 14022194613733384575957, 55099298574634623527360069025765

Offset

1,1

Links

Table of n, a(n) for n=1..7.

Crossrefs

Sequence in context: A168493 A003302 A053915 * A076088 A061211 A115988

Adjacent sequences: A067213 A067214 A067215 * A067217 A067218 A067219

Keyword

nonn,more

Author

R. H. Hardin, Feb 20 2002

Extensions

a(5)-a(7) from Sean A. Irvine, Dec 12 2023

Status

approved