a(n) = (n!)^2 + n! + n.A066084a(n) = (n!)^2 + n! + n.Terms a(0) =2a(1) =3a(2) =8a(3) =45a(4) =604a(5) =14525a(6) =519126a(7) =25406647a(8) =1625742728a(9) =131682257289External referencesoeis: A066084