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 A264470 Number of (n+1) X (n+1) arrays of permutations of 0..(n+1)^2-1 with each element having directed index change 0,1 1,0 2,1 or -1,-1. 0
 0, 2, 6, 120, 3540, 310748, 74367790, 44706530288, 66581992940380, 252580385620049120 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A264476. LINKS Table of n, a(n) for n=1..10. EXAMPLE Some solutions for n=4 ..6..0..8..9..3....6..0..1..2..3....6..7..1..9..3....6..0..8..9..3 .11..1..2.14..4...11..5.13.14..4....0..5..2.14..4...11..5..2..7..4 .16.10..7.19.13...16.17..7..8..9...16.17.11..8.13...16.10..1.12.13 .21..5.12.24.18...10.22.23.24.18...10.22.23.24.18...21.22.23.24.14 .15.20.17.22.23...15.20.21.12.19...15.20.21.12.19...15.20.17.18.19 CROSSREFS Cf. A264476. Sequence in context: A212158 A058251 A180058 * A039716 A164955 A060001 Adjacent sequences: A264467 A264468 A264469 * A264471 A264472 A264473 KEYWORD nonn AUTHOR R. H. Hardin, Nov 14 2015 STATUS approved

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Last modified November 30 05:42 EST 2023. Contains 367454 sequences. (Running on oeis4.)