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

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

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