Expansion of Sum_{k>0} k! * ( x * (1+x^k) )^k.
A370668
Expansion of Sum_{k>0} k! * ( x * (1+x^k) )^k.
Terms
- a(0) =1a(1) =3a(2) =6a(3) =28a(4) =120a(5) =740a(6) =5040a(7) =40416a(8) =362898a(9) =3629400a(10) =39916800a(11) =479006070a(12) =6227020800a(13) =87178326480
External references
- oeis: A370668