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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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 14 2011
STATUS
approved

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Last modified May 21 13:13 EDT 2024. Contains 372736 sequences. (Running on oeis4.)