A047881 a(n) = Sum_{h=0..n, k=0..n} T(h,k), array T counting knights' moves as in A049604.

0, 10, 20, 38, 62, 100, 150, 220, 302, 410, 536, 692, 868, 1080, 1316, 1594, 1898, 2248, 2630, 3064, 3530, 4054, 4616, 5240, 5904, 6636, 7412, 8262, 9158, 10132, 11158, 12268, 13430, 14682, 15992, 17396, 18860, 20424, 22052

Offset: 0

Author

Clark Kimberling

Keywords

• nonn

Crossrefs

Partial sums of A047879.

Formula

Conjecture: a(n) = a(n-1) + a(n-2) - 2*a(n-5) + a(n-8) + a(n-9) - a(n-10) for n > 11. - Chai Wah Wu, May 25 2016