A192308 - OEIS

%I #19 Aug 23 2025 23:12:11

%S 0,6,15,39,84,174,342,654,1221,2241,4056,7260,12876,22662,39627,68907,

%T 119244,205482,352770,603630,1029825,1752261,2974320,5037624,8515224,

%U 14367174,24200007,40699119,68348676,114629286,192009006,321250830,536903421,896410377

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

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

%F a(n) = 3*A122491(n+1).

%F G.f.: 3*x^2*(2-x)/(1-x)/(1-x-x^2)^2. - _Colin Barker_, Feb 11 2012

%t (* See A192307. *)

%Y Cf. A192232, A192307, A122491.

%K nonn

%O 1,2

%A _Clark Kimberling_, Jun 27 2011

%E More terms from _Jason Yuen_, Aug 23 2025