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 A301721 #20 Aug 30 2023 11:36:02 %S A301721 1,7,16,34,55,79,115,151,190,244,295,349,421,487,556,646,727,811,919, %T A301721 1015,1114,1240,1351,1465,1609,1735,1864,2026,2167,2311,2491,2647, %U A301721 2806,3004,3175,3349,3565,3751,3940,4174,4375,4579,4831,5047,5266,5536,5767,6001,6289,6535,6784,7090,7351,7615,7939,8215,8494,8836 %N A301721 Partial sums of A301720. %C A301721 Linear recurrence and g.f. confirmed by Shutov/Maleev link in A301720. - _Ray Chandler_, Aug 30 2023 %H A301721 Ray Chandler, <a href="/A301721/b301721.txt">Table of n, a(n) for n = 0..1000</a> %H A301721 <a href="/index/Rec#order_07">Index entries for linear recurrences with constant coefficients</a>, signature (1, 0, 2, -2, 0, -1, 1). %F A301721 From _Colin Barker_, Apr 09 2018: (Start) %F A301721 G.f.: (1 + 6*x + 9*x^2 + 16*x^3 + 9*x^4 + 6*x^5 + x^6) / ((1 - x)^3*(1 + x + x^2)^2). %F A301721 a(n) = a(n-1) + 2*a(n-3) - 2*a(n-4) - a(n-6) + a(n-7) for n>6. %F A301721 (End) %Y A301721 Cf. A301720. %K A301721 nonn %O A301721 0,2 %A A301721 _N. J. A. Sloane_, Mar 26 2018