A131710 - OEIS

%I #4 Mar 30 2012 18:51:52

%S 0,1,2,5,12,29,70,170,410,990,2390,5770,13930,33630,81190,196010,

%T 473210,1142430,2758070,6658570,16075210,38808990,93693190,226195370,

%U 546083930,1318363230,3182810390,7683984010,18550778410,44785540830,108121860070

%N Overlay of Pell numbers: a(n)=A000129(n)+A000129(n-6).

%F a(n)=A000129(n), n <=6. a(n)=10*A001333(n-3), n >=7.

%F O.g.f.: x(1+x^2)(1-x^2+x^4)/(1-2x-x^2). - _R. J. Mathar_, Jul 07 2008.

%K nonn

%O 0,3

%A _Paul Curtz_, Sep 14 2007

%E Edited by _R. J. Mathar_, Jul 07 2008