G.f.: 7/(3 + 4*sqrt(1-28*x)).

A130979

G.f.: 7/(3 + 4*sqrt(1-28*x)).

Terms

    a(0) =1a(1) =8a(2) =120a(3) =2192a(4) =44248a(5) =949488a(6) =21237168a(7) =489517344a(8) =11544312984a(9) =277190766896

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