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 A244876 #11 Jan 11 2017 18:21:16 %S A244876 1,18,154,813,3157,9880,26429,62713,135470,271285,510485,911840, %T A244876 1558368,2564093,4082142,6313934,9519951,14031732,20265700,28738335, %U A244876 40083439,55070862,74627587,99860383,132081092,172833583,223923623,287450506,365841890,461890475,578794188 %N A244876 Number of magic labelings with magic sum n of 8th graph shown in link. %H A244876 N. J. A. Sloane, <a href="/A244869/a244869.jpg">Graphs for A244869-A244876.</a> %H A244876 R. P. Stanley, <a href="/A002721/a002721.pdf">Examples of Magic Labelings</a>, Unpublished Notes, 1973 [Cached copy, with permission] %H A244876 <a href="/index/Rec#order_11">Index entries for linear recurrences with constant coefficients</a>, signature (5, -7, -5, 22, -14, -14, 22, -5, -7, 5, -1). %F A244876 G.f.: (1+13*x+71*x^2+174*x^3+238*x^4+174*x^5+71*x^6+13*x^7+x^8)/((1-x)^8*(1+x)^3). %F A244876 a(n) = 3*n^7/160 + 63*n^6/320 + 151*n^5/160 + 339*n^4/128 + 2251*n^3/480 + n^2*(-1)^n/64 + 1677*n^2/320 + 3*n*(-1)^n/64 + 3259*n/960 + 9*(-1)^n/256 + 247/256. [_Bruno Berselli_, Jul 08 2014] %t A244876 Table[3 n^7/160 + 63 n^6/320 + 151 n^5/160 + 339 n^4/128 + 2251 n^3/480 + n^2 (-1)^n/64 + 1677 n^2/320 + 3 n (-1)^n/64 + 3259 n/960 + 9 (-1)^n/256 + 247/256, {n,0,30}] (* _Bruno Berselli_, Jul 08 2014 *) %Y A244876 Cf. A244869-A244876. %K A244876 nonn,easy %O A244876 0,2 %A A244876 _N. J. A. Sloane_, Jul 08 2014