A209904 The number of 6 X 6 matrices of nonnegative integers such that the sum of the entries in the i-th row equals the sum of the i-th column for each i and the total sum equals n.

1, 6, 36, 186, 891, 3936, 16236, 62736, 228411, 786866, 2576112, 8045502, 24054897, 69070032, 191013552, 510099312, 1318511727, 3305802762, 8055148012, 19108956342, 44204128413, 99858745488, 220591105668, 477091381728, 1011385901553, 2103707920494

Offset

0,2

Links

Table of n, a(n) for n=0..25.

Crossrefs

Cf. A209836 (5 X 5 matrices).

Sequence in context: A074444 A348568 A366630 * A146883 A159721 A106539

Adjacent sequences: A209901 A209902 A209903 * A209905 A209906 A209907

Keyword

nonn

Author

Kazunori Nakamoto, Shingo Okuyama, Mar 15 2012

Status

approved