G.f.: Sum_{n>=0} x^n * Product_{k=3*n..4*n-1} (1 + (1+x)^k).
A338182
G.f.: Sum_{n>=0} x^n * Product_{k=3*n..4*n-1} (1 + (1+x)^k).
Terms
- a(0) =1a(1) =2a(2) =7a(3) =37a(4) =251a(5) =1947a(6) =17141a(7) =167163a(8) =1779029a(9) =20456722a(10) =251997747a(11) =3303602265a(12) =45842747207a(13) =670308495256
External references
- oeis: A338182