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 A110050 #7 May 11 2019 10:14:22 %S A110050 2,19,73,369,1697,8241,39441,190609,918929,4437649,21421201,103433361, %T A110050 499397777,2411316369,11642774673,56216331409,271436096657, %U A110050 1310609581201,6328181400721,30555163403409,147533373973649 %N A110050 Expansion of (2+9*x-24*x^3+16*x^4-30*x^2) / ((1-x)*(2*x+1)*(2*x-1)*(4*x^2+4*x-1)). %H A110050 Colin Barker, <a href="/A110050/b110050.txt">Table of n, a(n) for n = 0..1000</a> %H A110050 <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (5,4,-24,0,16). %F A110050 a(n) = 5*a(n-1) + 4*a(n-2) - 24*a(n-3) + 16*a(n-5) for n>4. - _Colin Barker_, May 11 2019 %p A110050 seriestolist(series((2+9*x-24*x^3+16*x^4-30*x^2)/((1-x)*(2*x+1)*(2*x-1)*(4*x^2+4*x-1)), x=0,25)); -or- Floretion Algebra Multiplication Program, FAMP Code: -kbasejrokseq[A*B] with A = + 'i - .5'j + .5'k - .5j' + .5k' - 'ii' - .5'ij' - .5'ik' - .5'ji' - .5'ki' and B = - .5'i + .5'j + 'k - .5i' + .5j' - 'kk' - .5'ik' - .5'jk' - .5'ki' - .5'kj'; RokType: Y[15] = Y[15] + 1/2 %o A110050 (PARI) Vec((2 + 9*x - 30*x^2 - 24*x^3 + 16*x^4) / ((1 - x)*(1 - 2*x)*(1 + 2*x)*(1 - 4*x - 4*x^2)) + O(x^25)) \\ _Colin Barker_, May 11 2019 %Y A110050 Cf. A110051, A110048. %K A110050 easy,nonn %O A110050 0,1 %A A110050 _Creighton Dement_, Jul 10 2005