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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
OFFSET
1,2
COMMENTS
Column 7 of A189435
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 22 2011
STATUS
approved