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A172642
Number of n X 4 0..2 arrays with row sums 4 and column sums n
4
1, 19, 175, 2371, 32611, 481381, 7343449, 115321795, 1849858771, 30189264889, 499616140189, 8365213132981, 141444270208645, 2411829493241299, 41425627536496495, 716068213864217155, 12447291755448613315
OFFSET
1,2
LINKS
CROSSREFS
Sequence in context: A060222 A041690 A217698 * A133740 A125382 A126540
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 06 2010
STATUS
approved