G.f.: exp( Sum_{n>=1} A082758(n)*x^n/n ), where A082758(n) = sum of the squares of the trinomial coefficients in row n of triangle A027907.

A168592

G.f.: exp( Sum_{n>=1} A082758(n)*x^n/n ), where A082758(n) = sum of the squares of the trinomial coefficients in row n of triangle A027907.

Terms

    a(0) =1a(1) =3a(2) =14a(3) =80a(4) =509a(5) =3459a(6) =24579a(7) =180389a(8) =1356743a(9) =10402493a(10) =81004516a(11) =638886082a(12) =5093081983a(13) =40971735401a(14) =332187974718

External references