a(n) = n for n = 0..3; for n>3, a(n) = 4*a(n-1) + 3*a(n-2) + 2*a(n-3) + a(n-4).
A258089
a(n) = n for n = 0..3; for n>3, a(n) = 4*a(n-1) + 3*a(n-2) + 2*a(n-3) + a(n-4).
Terms
- a(0) =0a(1) =1a(2) =2a(3) =3a(4) =20a(5) =94a(6) =444a(7) =2101a(8) =9944a(9) =47061a(10) =222722a(11) =1054060a(12) =4988472a(13) =23608573a(14) =111730550a(15) =528778923a(16) =2502512960a(17) =11843458282a(18) =56050660404a(19) =265266821305
External references
- oeis: A258089