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A187864 Number of 9-step one space for components leftwards or up, two space for components rightwards or down asymmetric quasi-queen's tours (antidiagonal moves become knight moves) on an n X n board summed over all starting positions 1
0, 0, 414, 124880, 2090520, 9934272, 29607932, 65963326, 123580937, 204771252, 310971475, 441931786, 597915172, 777662238, 981570648, 1208872830, 1459728029, 1734003242, 2031698469, 2352813710, 2697348965, 3065304234, 3456679517 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row 9 of A187857

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..50

FORMULA

Empirical: a(n) = 11710007*n^2 - 135575032*n + 380311550 for n>15

EXAMPLE

Some solutions for 4X4

..0..0..4..0....0..5..0..0....0..0..0..0....0..0..2..0....5..4..0..0

..9..0..6..3....0..4..3..7....0..5..7..6....4..0..1..8....0..3..2..1

..0..8..5..2....1..0..2..6....2..4..3..9....0..3..0..7....6..8..7..9

..0..0..7..1....0..0..9..8....1..8..0..0....0..6..5..9....0..0..0..0

CROSSREFS

Sequence in context: A231312 A210304 A332141 * A190028 A184545 A096032

Adjacent sequences:  A187861 A187862 A187863 * A187865 A187866 A187867

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 14 2011

STATUS

approved

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Last modified January 20 01:01 EST 2022. Contains 350467 sequences. (Running on oeis4.)