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A096191
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a(n) = Sum_{k=1..n} C(n,k)^3 where C(n,k) is binomial(n,k).
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1
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1, 9, 55, 345, 2251, 15183, 104959, 739161, 5280931, 38165259, 278415919, 2046924399, 15148345759, 112738423359, 843126957055, 6332299624281, 47737325577619, 361077477684435, 2739270870994735, 20836827035351595
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