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 A366328 G.f. satisfies A(x) = (1 + x) * (1 + x/A(x)^4). 4
 1, 2, -7, 60, -612, 6898, -82806, 1038076, -13431940, 178040315, -2405137161, 32992706368, -458336721104, 6435090557964, -91167680664004, 1301665779507128, -18710805300530504, 270559054510943509, -3932893180646204203, 57437414168562779574, -842365843304975785062 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Table of n, a(n) for n=0..20. FORMULA a(n) = (-1)^(n-1) * Sum_{k=0..n} binomial(5*k-1,k) * binomial(n+3*k-2,n-k)/(5*k-1). PROG (PARI) a(n) = (-1)^(n-1)*sum(k=0, n, binomial(5*k-1, k)*binomial(n+3*k-2, n-k)/(5*k-1)); CROSSREFS Cf. A073157, A364336, A364337, A364338, A364339, A366325, A366326, A366327. Cf. A118971, A364408. Sequence in context: A274600 A352625 A308681 * A091687 A000892 A211875 Adjacent sequences: A366325 A366326 A366327 * A366329 A366330 A366331 KEYWORD sign AUTHOR Seiichi Manyama, Oct 07 2023 STATUS approved

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Last modified May 22 10:24 EDT 2024. Contains 372745 sequences. (Running on oeis4.)