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A172762 Number of 2*n X n 0..3 arrays with row sums n and column sums 2*n 1
1, 19, 28681, 3017084995, 37642786694586601, 58256290618618126540488181, 11402923087449460426136950157514212457, 300748551220458753215613602117054376767307058363395 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
CROSSREFS
Sequence in context: A249907 A233105 A013528 * A203703 A068734 A216529
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 06 2010
STATUS
approved

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Last modified June 21 02:42 EDT 2024. Contains 373535 sequences. (Running on oeis4.)