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A189433 Number of nX7 array permutations with each element not moving, or moving one space N, SW or SE 1
1, 21, 441, 10069, 278105, 6944573, 181540773, 4742833745, 124239687001, 3261208487441, 85625162598265, 2250063012268697, 59139108575177913, 1554641730277194809, 40872537373376873929, 1074626580793742218601 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A189435

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..189

EXAMPLE

Some solutions for 3X7

..0..1..2..3..4.12..6....0..1..9.10.11..5..6....7..8..9.10..4..5.13

.14.15.16.17..5.19.13....7..8..3..2.18..4.13....1..0..3..2.11..6.20

..8..7.10..9.18.11.20...14.15.16.17.12.19.20...14.15.16.17.18.19.12

CROSSREFS

Sequence in context: A171295 A009965 A285873 * A041842 A215152 A199252

Adjacent sequences:  A189430 A189431 A189432 * A189434 A189435 A189436

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 22 2011

STATUS

approved

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Last modified October 27 22:24 EDT 2021. Contains 348305 sequences. (Running on oeis4.)