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A026997
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a(n) = Sum{T(n,k)*T(n,k+1)}, 0<=k<=n-1, T given by A026703.
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0
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1, 6, 35, 168, 926, 4294, 23224, 106690, 571926, 2617886, 13965688, 63815684, 339452265, 1549699466, 8228066295, 37543939462, 199095075169, 908167940082
(list; graph; refs; listen; history; internal format)
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