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A026653
a(n) = T(2n-1,n-2), T given by A026648.
0
1, 7, 30, 148, 610, 2823, 11690, 52952, 221094, 992190, 4173708, 18642456, 78906516, 351537963, 1495497690, 6652572976, 28420125190, 126308309058, 541492971140, 2405203008440, 10341957297084, 45920564571398, 197952999374468
OFFSET
2,2
CROSSREFS
Sequence in context: A323929 A180786 A343755 * A271554 A296013 A196338
KEYWORD
nonn
STATUS
approved