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 A192735 #14 Aug 10 2017 10:22:08 %S A192735 1,2,6,16,30,54,91,136,198,280,374,492,637,798,990,1216,1462,1746, %T A192735 2071,2420,2814,3256,3726,4248,4825,5434,6102,6832,7598,8430,9331, %U A192735 10272,11286,12376,13510,14724,16021,17366,18798,20320,21894,23562,25327,27148,29070 %N A192735 Left edge of the triangle in A033291. %C A192735 a(n) = A087483(n-2) * n. %H A192735 <a href="/index/Rec#order_08">Index entries for linear recurrences with constant coefficients</a>, signature (2,-1,2,-4,2,-1,2,-1). %F A192735 G.f.: x*(x^2+1)*(2*x^4+4*x^3+2*x^2+1) / ((x-1)^4*(x^2+x+1)^2). - _Colin Barker_, Mar 31 2013 %p A192735 A192735 := proc(n) %p A192735 A087483(n-2)*n ; %p A192735 end proc: %p A192735 seq(A192735(n),n=1..10) ; # _R. J. Mathar_, Aug 10 2017 %o A192735 (Haskell) See A033291. %Y A192735 Cf. A192736. %K A192735 nonn %O A192735 1,2 %A A192735 _Reinhard Zumkeller_, Jul 08 2011