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A026660
T(2n,n), T given by A026659.
0
1, 2, 8, 26, 118, 410, 1946, 6958, 33764, 122638, 602972, 2211946, 10970256, 40518606, 202195920, 750531666, 3762558534, 14019202506, 70531575722, 263582194126, 1329868264538, 4981772359258, 25193088990806, 94561764282118
OFFSET
0,2
CROSSREFS
Sequence in context: A150686 A150687 A150688 * A150689 A150690 A150691
KEYWORD
nonn
STATUS
approved