A026916 a(n) = T(n,0) + T(n,1) + ... + T(n,[ n/2 ]), T given by A026907.
1, 13, 72, 136, 419, 700, 1851, 3028, 7564, 12412, 30209, 50020, 119942, 200524, 475853, 802612, 1888976, 3211036, 7504737, 12844804, 29838451, 51379948, 118713767, 205520596, 472568449, 822083260, 1882043403
Offset: 0