

A187049


Number of 5step one or two space at a time bishop's tours on a n X n board summed over all starting positions


1



0, 0, 8, 456, 2896, 9216, 20648, 37472, 59524, 86656, 118868, 156160, 198532, 245984, 298516, 356128, 418820, 486592, 559444, 637376, 720388, 808480, 901652, 999904, 1103236, 1211648, 1325140, 1443712, 1567364, 1696096, 1829908, 1968800, 2112772
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OFFSET

1,3


COMMENTS

Row 5 of A187046


LINKS

R. H. Hardin, Table of n, a(n) for n = 1..35


FORMULA

Empirical: a(n) = 2540*n^2  21128*n + 43936 for n>7


EXAMPLE

Some solutions for 4X4
..0..0..0..0....0..0..0..0....0..0..3..0....4..0..0..0....0..5..0..1
..0..0..1..0....0..4..0..0....0..2..0..4....0..5..0..1....0..0..0..0
..0..4..0..2....3..0..1..0....0..0..0..0....0..0..3..0....0..2..0..4
..5..0..3..0....0..2..0..5....0..5..0..1....0..2..0..0....0..0..3..0


CROSSREFS

Sequence in context: A042525 A028449 A209840 * A221157 A015006 A054326
Adjacent sequences: A187046 A187047 A187048 * A187050 A187051 A187052


KEYWORD

nonn


AUTHOR

R. H. Hardin Mar 02 2011


STATUS

approved



