A192142 1-sequence of reduction of (n^2+n+1) by x^2 -> x+1.

0, 3, 10, 36, 99, 254, 598, 1339, 2872, 5966, 12071, 23908, 46516, 89155, 168702, 315712, 585163, 1075442, 1961754, 3554715, 6402780, 11470778, 20450255, 36297576, 64164744, 113006019, 198345298, 347033724, 605414067, 1053307526

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*(3-2*x+5*x^2+x^4)/(1-x)/(1-x-x^2)^3. [Colin Barker, Feb 11 2012]

Mathematica

(See A192299.)

Crossrefs

Cf. A192232, A192299.

Sequence in context: A119977 A319733 A075316 * A212962 A246975 A047122

Adjacent sequences: A192139 A192140 A192141 * A192143 A192144 A192145

Keyword

nonn

Author

Clark Kimberling, Jun 27 2011

Status

approved