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A026686
T(2n-1,n-2), T given by A026681.
0
1, 9, 37, 237, 913, 5506, 21113, 124845, 480515, 2818051, 10898715, 63665402, 247327912, 1441838546, 5623080622, 32744927553, 128128256975, 745693719711, 2926139332637, 17024729505077, 66969147934417, 389584877937332
OFFSET
2,2
CROSSREFS
Sequence in context: A232258 A370244 A370269 * A076174 A117085 A120780
KEYWORD
nonn
STATUS
approved