a(n) = (n+2)*(a(n-1) - a(n-2)), starting with a(-1)=0 and a(0)=1.
A051403
a(n) = (n+2)*(a(n-1) - a(n-2)), starting with a(-1)=0 and a(0)=1.
Terms
- a(0) =0a(1) =1a(2) =3a(3) =8a(4) =25a(5) =102a(6) =539a(7) =3496a(8) =26613a(9) =231170a(10) =2250127a(11) =24227484a(12) =285705641a(13) =3660694198a(14) =50624828355a(15) =751426146512
External references
- oeis: A051403