This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A164852 #7 Jun 02 2025 01:52:46
%S A164852 1,12,13,124,137,1251,1388,12539,13927,125466,139393,1254859,1394252,
%T A164852 12549111,13943363,125492474,139435837,1254928311,1394364148,
%U A164852 12549292459,13943656607,125492949066,139436605673,1254929554739,1394366160412,12549295715151
%N A164852 Diagonal sum of generalized Lucas-Pascal triangle;(11*10^n,1).
%H A164852 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (1,11,-10,-10).
%F A164852 G.f.: -x*(-1-11*x+10*x^2+11*x^3) / ( (10*x^2-1)*(x^2+x-1) ). - _R. J. Mathar_, Nov 03 2016
%t A164852 LinearRecurrence[{1,11,-10,-10},{1,12,13,124},40] (* _Harvey P. Dale_, Aug 05 2018 *)
%Y A164852 A164851, A000032
%K A164852 nonn,easy
%O A164852 1,2
%A A164852 _Mark Dols_, Aug 28 2009
%E A164852 More terms from _Harvey P. Dale_, Aug 05 2018