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 A050913 Pure 2-complexes on an infinite set of nodes with n multiple 2-simplexes. Also n-rowed binary matrices with all row sums 3, up to row and column permutation. 14
 1, 1, 4, 16, 93, 652, 6369, 79568, 1256425, 24058631, 543204998, 14138916124, 417362929209, 13798729189578, 505990335048034, 20415765544541866, 900364519682003919, 43155049922002494115, 2236988329443856718604, 124862936181977439454012, 7476052709321753156375756, 478506183522725779096476581, 32638841238874891261354722405, 2365895836144423508306322639848, 181785988254681334224483607437510, 14771116583797935886529061991645404, 1266545494725474774697216198539818982 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS CROSSREFS Cf. A050911, A050912, A001400, A014395, A082789, A082790, A058790. Sequence in context: A003762 A143501 A111291 * A096243 A263565 A131928 Adjacent sequences:  A050910 A050911 A050912 * A050914 A050915 A050916 KEYWORD nonn AUTHOR Vladeta Jovovic, Dec 29 1999 EXTENSIONS More terms from T. Forbes (anthony.d.forbes(AT)googlemail.com), May 24, 2003 STATUS approved

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Last modified December 14 01:33 EST 2019. Contains 329978 sequences. (Running on oeis4.)