Expansion of g.f.: exp( Sum_{n>=1} [ Sum_{k>=0} C(n+k-1,k)^4 *x^k ] *x^n/n ).
A181068
Expansion of g.f.: exp( Sum_{n>=1} [ Sum_{k>=0} C(n+k-1,k)^4 *x^k ] *x^n/n ).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =11a(4) =80a(5) =714a(6) =7095a(7) =76206a(8) =864590a(9) =10227727a(10) =125001862a(11) =1568419058a(12) =20108619244a(13) =262510020319
External references
- oeis: A181068