Number of pure 2-complexes on 7 unlabeled nodes with n multiple 2-simplexes.

A050912

Number of pure 2-complexes on 7 unlabeled nodes with n multiple 2-simplexes.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =14a(4) =62a(5) =272a(6) =1307a(7) =6178a(8) =28687a(9) =127074a(10) =534414a(11) =2125086a(12) =8003063a(13) =28603253a(14) =97334199a(15) =316359888a(16) =985253099a(17) =2948785272a(18) =8504664978a(19) =23695762074a(20) =63924853698a(21) =167320196102a(22) =425715789486

External references