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A027232
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a(n) = Sum{T(n,k)*T(n,k+1), 0<=k<=n-1, T given by A026758.
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0
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1, 4, 19, 72, 355, 1347, 6843, 26077, 135752, 519336, 2760110, 10591394, 57299551, 220393887, 1210772453, 4665698732, 25974365600, 100243916036, 564517479641
(list; graph; refs; listen; history; internal format)
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