a(n) is the coefficient of y^n in Product_{k=0..n-1} (1 + (k+2)*y + y^2), for n >= 0.
A324961
a(n) is the coefficient of y^n in Product_{k=0..n-1} (1 + (k+2)*y + y^2), for n >= 0.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =42a(4) =268a(5) =2000a(6) =17038a(7) =162890a(8) =1725372a(9) =20044728a(10) =253332924a(11) =3459443988a(12) =50751642214a(13) =795946804016
External references
- oeis: A324961