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A058410 Number of 4 X n nonnegative integer matrices with all column sums 4, up to row and column permutation. 2
1, 5, 45, 407, 3411, 25142, 163711, 947909, 4949257, 23579022, 103592423, 423435205, 1622413728, 5864055622, 20102107500, 65660463140, 205176581382, 615506305973, 1778086106680, 4959845850882, 13391444267162, 35072585737475, 89275252614236, 221246652070184 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
G.f.: 1 / 24*(1 / (1 - x)^35 + 6 / (1 - x)^9 / (1 - x^2)^13 + 3 / (1 - x)^3 / (1 - x^2)^16 + 8 / (1 - x)^2 / (1 - x^3)^11 + 6 / (1 - x) / (1 - x^2) / (1 - x^4)^8).
CROSSREFS
Sequence in context: A173292 A173558 A022022 * A005979 A165225 A121272
KEYWORD
easy,nonn
AUTHOR
Vladeta Jovovic, Nov 25 2000
EXTENSIONS
More terms from Sean A. Irvine, Aug 05 2022
STATUS
approved

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Last modified May 18 03:12 EDT 2024. Contains 372617 sequences. (Running on oeis4.)