A188790 Number of 7-step self-avoiding walks on an n X n X n X n 4-cube summed over all starting positions.

0, 9984, 748128, 5886720, 22274448, 59693952, 130988744, 252065024, 441881832, 722450048, 1118832392, 1659143424, 2374549544, 3299268992, 4470571848, 5928780032, 7717267304, 9882459264, 12473833352, 15543918848, 19148296872

Offset

1,2

Comments

Row 7 of A188784.

Links

R. H. Hardin, Table of n, a(n) for n = 1..43

Formula

Empirical: a(n) = 127160*n^4 - 654960*n^3 + 1132704*n^2 - 762240*n + 162048 for n>5.

Empirical formula is valid: see A188784. - Robert Israel, Apr 30 2018

Crossrefs

Cf. A188784.

Sequence in context: A254975 A182696 A126978 * A190832 A043528 A089521

Adjacent sequences: A188787 A188788 A188789 * A188791 A188792 A188793

Keyword

nonn

Author

R. H. Hardin, Apr 10 2011

Status

approved