A026722 a(n) = T(n,0) + T(n,1) + ... + T(n,[ n/2 ]), T given by A026714.

1, 1, 4, 6, 21, 34, 113, 188, 607, 1023, 3246, 5509, 17290, 29465, 91820, 156878, 486549, 832671, 2574116, 4410189, 13602994, 23323442, 71826377, 123216902, 379031585, 650462028, 1999308247, 3431941721, 10542607578, 18100449404