Number of (undirected) paths in the m X n king graph (triangle read by rows with m = 1..n and n = 1..).

A307026

Number of (undirected) paths in the m X n king graph (triangle read by rows with m = 1..n and n = 1..).

Terms

    a(0) =0a(1) =1a(2) =30a(3) =3a(4) =235a(5) =5148a(6) =6a(7) =1448a(8) =96956a(9) =6014812a(10) =10a(11) =7909a(12) =1622015a(13) =329967798a(14) =57533191444a(15) =15a(16) =40674a(17) =25281625a(18) =16997993692a(21) =21a(22) =202719a(23) =375341540a(24) =834776217484

External references