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 A171734 #12 Apr 16 2023 12:33:13 %S A171734 2,0,6,24,10,96,14,240,18,480,22,840,26,1344,30,2016,34,2880,38,3960, %T A171734 42,5280,46,6864,50,8736,54,10920,58,13440,62,16320,66,19584,70,23256, %U A171734 74,27360,78,31920,82,36960,86,42504,90,48576,94,55200,98,62400,102 %N A171734 First differences of A171733. %H A171734 <a href="/index/Rec#order_08">Index entries for linear recurrences with constant coefficients</a>, signature (0,4,0,-6,0,4,0,-1). %F A171734 a(2n) = A016825(n). a(2n+1) = 24*A000292(n). %F A171734 G.f.: 2*( 1-x^2+12*x^3-x^4+x^6 ) / ( (x-1)^4*(1+x)^4 ). - _R. J. Mathar_, Jul 02 2011 %Y A171734 Cf. A171733, A000292, A016825. %K A171734 nonn,easy %O A171734 0,1 %A A171734 _Paul Curtz_, Dec 17 2009