A067221 Number of n X n 0..13 matrices with all row and column sums equal.

1, 14, 196, 162722, 21592075596, 428134536074377254, 1326740266296956878519910950

Offset

0,2

Links

Table of n, a(n) for n=0..6.

Crossrefs

Column k=13 of A202784.

Sequence in context: A171288 A001023 A278476 * A072533 A041085 A124239

Adjacent sequences: A067218 A067219 A067220 * A067222 A067223 A067224

Keyword

nonn,more

Author

R. H. Hardin, Feb 20 2002

Extensions

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

a(0)=1 prepended by Andrew Howroyd, Oct 14 2024

Status

approved