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 A263706 T(n,k)=Number of (n+2)X(k+2) arrays of permutations of 0..(n+2)*(k+2)-1 with each element moved 0 or 1 knight moves and equal numbers of elements advancing and retreating in the array numbered in row major order. 4
 49, 475, 569, 3588, 18995, 4020, 33265, 474101, 437533, 38769, 292865, 14115520, 30745811, 13341380, 355145, 2600010, 452888405, 2977192536, 3002676432, 414860767, 3191484, 23355021, 14143461755 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ......49.......475.......3588......33265....292865.....2600010.23355021 .....569.....18995.....474101...14115520.452888405.14143461755 ....4020....437533...30745811.2977192536 ...38769..13341380.3002676432 ..355145.414860767 .3191484 LINKS Table of n, a(n) for n=1..23. EXAMPLE Some solutions for n=2 k=4 ..0..1.13.16.15..5....0..1.15.14.17..5....0..1.10..3..4.16....0..1.10.16..8..5 ..6..7..8.20.23.11....6..7.16.13.21.11....6..7..8.13.23.22....6..7..4.17.21.15 .12..2.22..4..3.21...12..9.10..2..3..4...12..9.14..2..5.21...12..2.14.11..3..9 .18.19..9.17.14.10...18.19.20..8.22.23...18.19.20.17.11.15...18.19.20.13.22.23 CROSSREFS Sequence in context: A250082 A012097 A218594 * A263707 A061621 A337356 Adjacent sequences: A263703 A263704 A263705 * A263707 A263708 A263709 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Oct 24 2015 STATUS approved

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Last modified December 1 06:44 EST 2023. Contains 367468 sequences. (Running on oeis4.)