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

0,1

Links

Table of n, a(n) for n=0..31.

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

Formula

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

Crossrefs

Cf. A212338 (partial sums)

Sequence in context: A056358 A336229 A296502 * A125615 A096772 A090803

Adjacent sequences: A036678 A036679 A036680 * A036682 A036683 A036684

Keyword

nonn,easy

Author

Floor van Lamoen

Status

approved