a(n) = (-1)^n + (-2)^n + 3^n (-1, -2 and 3 are the roots of the equation x^3 = 7*x + 6).
A135399
a(n) = (-1)^n + (-2)^n + 3^n (-1, -2 and 3 are the roots of the equation x^3 = 7*x + 6).
Terms
- a(0) =3a(1) =0a(2) =14a(3) =18a(4) =98a(5) =210a(6) =794a(7) =2058a(8) =6818a(9) =19170a(10) =60074a(11) =175098a(12) =535538a(13) =1586130a(14) =4799354a(15) =14316138a(16) =43112258a(17) =129009090a(18) =387682634a(19) =1161737178a(20) =3487832978a(21) =10458256050a(22) =31385253914a(23) =94134790218a(24) =282446313698a(25) =847255055010
External references
- oeis: A135399