

A187863


Number of 8step one space for components leftwards or up, two space for components rightwards or down asymmetric quasiqueen's tours (antidiagonal moves become knight moves) on an n X n board summed over all starting positions


1



0, 0, 1008, 61668, 636102, 2432312, 6343874, 12918800, 22675997, 35694138, 52156394, 71825663, 94825088, 120967427, 150298947, 182782127, 218416967, 257203467, 299141627, 344231447, 392472927, 443866067, 498410867, 556107327
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OFFSET

1,3


COMMENTS



LINKS



FORMULA

Empirical: a(n) = 1575830*n^2  16367550*n + 41250447 for n>13


EXAMPLE

Some solutions for 4X4
..0..7..0..0....0..7..0..0....0..0..0..3....5..0..0..0....0..0..5..0
..1..6..0..0....1..6..2..0....7..1..0..2....4..0..7..0....8..0..4..0
..3..5..4..8....8..5..4..0....0..6..5..4....0..3..6..0....7..6..0..3
..2..0..0..0....0..0..3..0....8..0..0..0....0..8..2..1....0..2..1..0


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



