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A026973
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a(n) = Sum{T(n,k)*T(n,k+2)}, 0<=k<=n-2, T given by A026648.
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0
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1, 8, 52, 224, 1131, 4620, 23456, 92752, 460170, 1805760, 8946216, 34942176, 172593267, 673129380, 3323413216, 12954246368, 63944790462, 249263001360
(list; graph; refs; listen; history; internal format)
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