a(n+1) = a(n)^2 + n*a(n) + n^2, a(1) = 1.A143762a(n+1) = a(n)^2 + n*a(n) + n^2, a(1) = 1.Terms a(0) =1a(1) =3a(2) =19a(3) =427a(4) =184053a(5) =33876427099External referencesoeis: A143762