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A172766 Number of 3*n X n 0..3 arrays with row sums 5 and column sums 15 1
0, 20, 95635680, 28021865662196736, 180748183717038324996985791, 15496001580602804970376043343562432320, 12274752385434683822697731132401886699781192750720 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

R. H. Hardin, Table of n, a(n) for n=1..13

CROSSREFS

Sequence in context: A013812 A013894 A128671 * A048948 A172834 A271976

Adjacent sequences:  A172763 A172764 A172765 * A172767 A172768 A172769

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2010

STATUS

approved

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Last modified May 17 00:26 EDT 2022. Contains 353724 sequences. (Running on oeis4.)