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A187865 Number of 10-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, 0, 219008, 6387404, 38766870, 133665550, 327612556, 658127610, 1150253908, 1821396586, 2678117739, 3721029612, 4946379865, 6353213493, 7935533922, 9694577705, 11627337878, 13734354068, 16015165378, 18469771808, 21098173358 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Row 10 of A187857

LINKS

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

FORMULA

Empirical: a(n) = 86897560*n^2 - 1108193530*n + 3420011978 for n>17

EXAMPLE

Some solutions for 4X4

..0..9..0..0....9..8..3..2....0..9..8..5....0..0..6..0....0..1.10..2

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

..0..6..2.10...10..4..6..5...10..3..0..6....3..7..0.10....0..8..3..0

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

CROSSREFS

Sequence in context: A236040 A251480 A072189 * A201227 A185531 A258678

Adjacent sequences:  A187862 A187863 A187864 * A187866 A187867 A187868

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 14 2011

STATUS

approved

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Last modified May 16 21:28 EDT 2021. Contains 343951 sequences. (Running on oeis4.)