a(n) = a(n-1)*2^n+n, a(0)=1.A180435a(n) = a(n-1)*2^n+n, a(0)=1.Terms a(0) =1a(1) =3a(2) =14a(3) =115a(4) =1844a(5) =59013a(6) =3776838a(7) =483435271a(8) =123759429384External referencesoeis: A180435