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 A247598 Number of nonisomorphic binary n X n matrices with five 1's per column under row and column permutations. 5
 1, 11, 471, 122038, 85820809, 96018336018, 146662126879117, 291352421255114277, 734102568216405642199, 2304488853198195872625924, 8882860158091727486388086786, 41519759838668575020971562079517, 232748666229847254694256869145439898, 1549417862125158239133077344950011140191 (list; graph; refs; listen; history; text; internal format)
 OFFSET 5,2 LINKS Andrew Howroyd, Table of n, a(n) for n = 5..40 StackExchange, How many arrays with crossed cells, order of rows/columns irrelevant, Dec 13 2013 MAPLE seq(matrix_marks(n, 5), n=3..15); # Using the uploaded program to A247417 PROG (PARI) \\ See A304942 for Blocks a(n) = Blocks(n, n, 5); \\ Andrew Howroyd, May 24 2018 CROSSREFS Column k=5 of A304942. Cf. A247417, A247596, A247597. Sequence in context: A233219 A288685 A068235 * A303207 A266026 A156863 Adjacent sequences:  A247595 A247596 A247597 * A247599 A247600 A247601 KEYWORD nonn AUTHOR Marko Riedel, Sep 21 2014 EXTENSIONS Terms a(16) and beyond from Andrew Howroyd, May 24 2018 STATUS approved

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Last modified August 15 00:52 EDT 2020. Contains 336484 sequences. (Running on oeis4.)