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A189275 Number of nX4 array permutations with each element not moved or moved diagonally or antidiagonally by one 2
1, 25, 225, 2704, 29241, 323761, 3553225, 39100009, 429981696, 4729725529, 52022767225, 572215089601, 6293931930441, 69228590218384, 761462776998225, 8375523274873225, 92124512415080401, 1013300979290647441 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 4 of A189280
LINKS
FORMULA
Empirical: a(n) = 12*a(n-1) -7*a(n-2) -78*a(n-3) +365*a(n-4) +67*a(n-5) +269*a(n-6) -269*a(n-7) -67*a(n-8) -365*a(n-9) +78*a(n-10) +7*a(n-11) -12*a(n-12) +a(n-13)
EXAMPLE
Some solutions for 3X4
..0..4..2..3....0..6..5..3....0..6..7..3....0..6..7..3....0..6..2..3
..1.10.11..7....4.10..1..2....9.10..1..2....9..8..1..2....1.10..9..7
..8..9..5..6....8..9..7.11....8..4..5.11....5..4.10.11....8..4..5.11
CROSSREFS
Sequence in context: A095241 A067472 A058426 * A048384 A191486 A030485
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 19 2011
STATUS
approved

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Last modified March 28 04:13 EDT 2024. Contains 371235 sequences. (Running on oeis4.)