a(n) = coefficient of x^n*y^(n+1)/n! in (1/2) * log( Sum_{n>=0} (n^2 + n*y + 2*y^2)^n * x^n/n! ).
A359918
a(n) = coefficient of x^n*y^(n+1)/n! in (1/2) * log( Sum_{n>=0} (n^2 + n*y + 2*y^2)^n * x^n/n! ).
Terms
- a(0) =1a(1) =2a(2) =21a(3) =304a(4) =6985a(5) =205056a(6) =7607509a(7) =337188608a(8) =17495079921
External references
- oeis: A359918