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A172743 Number of n X 3 0..3 arrays with row sums 3 and column sums n. 1
1, 7, 55, 415, 3391, 28681, 248137, 2186815, 19546975, 176703337, 1612210777, 14823083089, 137176167025, 1276548044695, 11936862061495, 112092031526335, 1056512066133055, 9991003788000025, 94760438267696425, 901154863603211665 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

R. H. Hardin, Table of n, a(n) for n=1..99

CROSSREFS

Sequence in context: A217327 A069404 A198689 * A015564 A070997 A122372

Adjacent sequences:  A172740 A172741 A172742 * A172744 A172745 A172746

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 06 2010

STATUS

approved

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Last modified September 25 12:44 EDT 2017. Contains 292469 sequences.