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A187305 Number of 10-step one space leftwards or up, two space rightwards or down asymmetric rook's tours on an n X n board summed over all starting positions 1
0, 0, 0, 3096, 44824, 187924, 505878, 1044900, 1847506, 2912204, 4254568, 5853664, 7715596, 9827696, 12192058, 14805028, 17667036, 20777536, 24136566, 27744092, 31600114, 35704632, 40057646, 44659156, 49509162, 54607664, 59954662, 65550156 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Row 10 of A187296

LINKS

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

FORMULA

Empirical: a(n) = 124248*n^2 - 1238146*n + 2807812 for n>17

CROSSREFS

Sequence in context: A092129 A251871 A206132 * A236121 A252884 A103523

Adjacent sequences:  A187302 A187303 A187304 * A187306 A187307 A187308

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 08 2011

STATUS

approved

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Last modified November 18 00:38 EST 2017. Contains 294837 sequences.