A036681 T(n+2,2) with T as in A036355.

2, 5, 14, 32, 71, 149, 304, 604, 1177, 2256, 4266, 7974, 14758, 27079, 49312, 89200, 160393, 286867, 510596, 904838, 1597091, 2808672, 4922820, 8601660, 14986730, 26042201, 45141410, 78067712, 134719931, 232014593, 398818552, 684322432

Offset: 0

Author

Floor van Lamoen

Keywords

• nonn
• easy

Links

• Index entries for linear recurrences with constant coefficients, signature (3,0,-5,0,3,1).

Crossrefs

Cf. A212338 (partial sums)

Formula

G.f.: (2+x)*(1-x)/(1-x-x^2)^3.