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A026684
T(2n,n-2), T given by A026681.
0
1, 11, 50, 352, 1412, 9012, 35218, 216556, 841161, 5080487, 19727183, 117977884, 458783666, 2727417052, 10627866041, 62938875136, 245774605829, 1451708319833, 5680430498730, 33491080099092, 131295252750566, 773074959646212
OFFSET
2,2
CROSSREFS
Sequence in context: A167423 A026618 A266034 * A181619 A067983 A175360
KEYWORD
nonn
STATUS
approved