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A188790 Number of 7-step self-avoiding walks on an n X n X n X n 4-cube summed over all starting positions. 1
0, 9984, 748128, 5886720, 22274448, 59693952, 130988744, 252065024, 441881832, 722450048, 1118832392, 1659143424, 2374549544, 3299268992, 4470571848, 5928780032, 7717267304, 9882459264, 12473833352, 15543918848, 19148296872 (list; graph; refs; listen; history; text; internal format)
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

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Last modified November 19 11:09 EST 2019. Contains 329319 sequences. (Running on oeis4.)