a(n) is the cube of the coefficient of x^n in 1/(1 - x*A(x^3)), where g.f. A(x) = Sum_{n>=0} a(n)*x^n.
A121652
a(n) is the cube of the coefficient of x^n in 1/(1 - x*A(x^3)), where g.f. A(x) = Sum_{n>=0} a(n)*x^n.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =8a(5) =27a(6) =64a(7) =216a(8) =729a(9) =2197a(10) =6859a(11) =21952a(12) =68921a(13) =300763a(14) =1061208a(15) =3375000a(16) =14348907a(17) =54010152a(18) =183250432a(19) =716917375a(20) =2685619000a(21) =9460870875a(22) =38136631896a(23) =142973623989a(24) =507024206424
External references
- oeis: A121652