a(n) = a(n-1) + 2*a(n-2) - 2*a(n-3) + 3*a(n-4) - 3*a(n-5), where a(0) = 1, a(1) = 3, a(2) = 6, a(3) = 11, a(4) = 20, a(5) = 33.
A297443
a(n) = a(n-1) + 2*a(n-2) - 2*a(n-3) + 3*a(n-4) - 3*a(n-5), where a(0) = 1, a(1) = 3, a(2) = 6, a(3) = 11, a(4) = 20, a(5) = 33.
Terms
- a(0) =1a(1) =3a(2) =6a(3) =11a(4) =20a(5) =33a(6) =60a(7) =101a(8) =182a(9) =303a(10) =546a(11) =911a(12) =1640a(13) =2733a(14) =4920a(15) =8201a(16) =14762a(17) =24603a(18) =44286a(19) =73811a(20) =132860a(21) =221433a(22) =398580a(23) =664301a(24) =1195742a(25) =1992903a(26) =3587226a(27) =5978711a(28) =10761680a(29) =17936133
External references
- oeis: A297443