A026117 T(n,[ n/2 ]), where T is the array defined in A026105.
1, 1, 1, 2, 6, 10, 30, 50, 160, 265, 873, 1442, 4851, 7996, 27300, 44928, 155115, 254950, 887910, 1457852, 5112767, 8387170, 29582886, 48492028, 171857127, 281521541, 1001762125, 1640055250, 5856231825, 9582770760, 34320863160, 56135075250
Offset: 0