A213494 a(n) = A213493(n)/12.

0, 0, 0, 0, 0, 0, 1, 4, 8, 17, 25, 40, 57, 81, 105, 141, 177, 225, 274, 337, 401, 482, 562, 661, 762, 882, 1002, 1146, 1290, 1458, 1627, 1822, 2018, 2243, 2467, 2722, 2979, 3267, 3555, 3879, 4203, 4563, 4924, 5323, 5723, 6164, 6604, 7087, 7572

Offset: 0

Author

Clark Kimberling, Jun 13 2012

Keywords

• nonn
• easy

Links

• Index entries for linear recurrences with constant coefficients, signature (1,1,0,0,-2,0,0,1,1,-1).

Crossrefs

Cf. A213493.

Programs

Mathematica

LinearRecurrence[{1,1,0,0,-2,0,0,1,1,-1},{0,0,0,0,0,0,1,4,8,17},60] (* Harvey P. Dale, Jul 03 2021 *)

Formula

a(n) = a(n-1)+a(n-2)-2*a(n-5)+a(n-8)+a(n-9)-a(n-10).

G.f.: (x^6 + 3*x^7 + 3*x^8 + 5*x^9)/(1 - x - x^2 + 2*x^5 - x^8 - x^9 + x^10).