a(0)=1, a(n+1) = a(0) + a(1)*a(2) + a(3)*a(4)*a(5) + a(6)*a(7)*a(8)*a(9) + ... + ...*a(n).
A227367
a(0)=1, a(n+1) = a(0) + a(1)*a(2) + a(3)*a(4)*a(5) + a(6)*a(7)*a(8)*a(9) + ... + ...*a(n).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =6a(5) =21a(6) =381a(7) =762a(8) =290703a(9) =84397476747
External references
- oeis: A227367