A192310 1-sequence of reduction of (3n-1) by x^2 -> x+1.

0, 5, 13, 35, 77, 162, 322, 621, 1167, 2153, 3913, 7028, 12500, 22053, 38641, 67311, 116661, 201302, 346006, 592685, 1012115, 1723605, 2927953, 4962600, 8393832, 14170757, 23882197, 40184891, 67516637, 113283018

Offset

1,2

Comments

See A192232 for definition of "k-sequence of reduction of [sequence] by [substitution]".

Links

Table of n, a(n) for n=1..30.

Formula

Empirical G.f.: x^2*(5-2*x+x^2)/(1-x)/(1-x-x^2)^2. [Colin Barker, Feb 11 2012]

Mathematica

(See A192309.)

Crossrefs

Cf. A192232, A192309.

Sequence in context: A171262 A006561 A146845 * A167710 A229924 A264080

Adjacent sequences: A192307 A192308 A192309 * A192311 A192312 A192313

Keyword

nonn

Author

Clark Kimberling, Jun 27 2011

Status

approved