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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. 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

CROSSREFS

Cf. A209836 (5 X 5 matrices).

Sequence in context: A258629 A294465 A074444 * A146883 A159721 A106539

Adjacent sequences:  A209901 A209902 A209903 * A209905 A209906 A209907

KEYWORD

nonn

AUTHOR

Kazunori Nakamoto, Shingo Okuyama, Mar 15 2012

STATUS

approved

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Last modified October 22 16:15 EDT 2021. Contains 348174 sequences. (Running on oeis4.)