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A026578
T(2n-1,n-2), T given by A026568.
0
1, 3, 13, 60, 225, 1148, 4235, 22296, 82425, 440308, 1634435, 8809736, 32819839, 178029138, 665162897, 3625521728, 13577768505
OFFSET
2,2
CROSSREFS
Sequence in context: A331517 A340411 A074437 * A362596 A199641 A357151
KEYWORD
nonn
STATUS
approved