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Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!) A172608 Number of 7*n X 7 0..1 arrays with row sums 3 and column sums 3*n 1 68938800, 617944896216648000, 12218892645550878420052920000, 337799058758556439723480176591336120000, 11251027489082268563385494644966780470231583948800 (list; graph; refs; listen; history; text; internal format) OFFSET 1,1 LINKS R. H. Hardin, Table of n, a(n) for n=1..13 CROSSREFS Sequence in context: A084071 A251615 A321706 * A294989 A204405 A186618 Adjacent sequences: A172605 A172606 A172607 * A172609 A172610 A172611 KEYWORD nonn AUTHOR R. H. Hardin Feb 06 2010 STATUS approved

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Last modified August 18 20:19 EDT 2024. Contains 375275 sequences. (Running on oeis4.)