G.f. satisfies: A(x) = Sum_{n>=0} 3^n*A(x)^n * x^(n^2) / Product_{k=1..n} (1 - 3*x^k)*(1 - x^k*A(x)).
A206638
G.f. satisfies: A(x) = Sum_{n>=0} 3^n*A(x)^n * x^(n^2) / Product_{k=1..n} (1 - 3*x^k)*(1 - x^k*A(x)).
Terms
- a(0) =1a(1) =3a(2) =21a(3) =147a(4) =1074a(5) =8076a(6) =62454a(7) =494292a(8) =3990378a(9) =32756142a(10) =272715870a(11) =2297982828a(12) =19563641319a(13) =168036314862
External references
- oeis: A206638