A067223 Number of n X n 0..15 matrices with all row and column sums equal.

16, 256, 316624, 81851507456, 4128449284755670956, 42503886964244001261643010752

Offset

1,1

Links

Table of n, a(n) for n=1..6.

Crossrefs

Sequence in context: A204080 A223433 A223593 * A041113 A363689 A041482

Adjacent sequences: A067220 A067221 A067222 * A067224 A067225 A067226

Keyword

nonn,more

Author

R. H. Hardin, Feb 20 2002

Extensions

a(5)-a(6) from Sean A. Irvine, Dec 10 2023

Status

approved