G.f. B(x) satisfies: B(x) = x + 2*A(x)*C(x), where A(x) = x + C(x)*B(x) and C(x) = x + 3*A(x)*B(x).

A229812

G.f. B(x) satisfies: B(x) = x + 2*A(x)*C(x), where A(x) = x + C(x)*B(x) and C(x) = x + 3*A(x)*B(x).

Terms

    a(0) =1a(1) =2a(2) =8a(3) =34a(4) =184a(5) =1010a(6) =5936a(7) =35770a(8) =221872a(9) =1401890a(10) =9005240a(11) =58596754a(12) =385519912a(13) =2560003442a(14) =17135913440a(15) =115500024010a(16) =783243325792

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