A094956 Diagonal T(n+2,n) of array A094954.
1, 3, 19, 169, 1926, 26839, 442961, 8459361, 183642229, 4468927451, 120540804396, 3570537526921, 115246129602241, 4026668668065135, 151435858582831951, 6100080207560938369, 262054579034061036018
Offset: 1