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A156341
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G.f.: (2-6*x)/(1-12*x+11*x^2).
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0
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2, 18, 194, 2130, 23426, 257682, 2834498, 31179474, 342974210, 3772716306, 41499879362, 456498672978, 5021485402754, 55236339430290, 607599733733186, 6683597071065042, 73519567781715458, 808715245598870034, 8895867701587570370, 97854544717463274066
(list; graph; refs; listen; history; internal format)
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