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 A337282 #15 Jul 16 2021 10:05:17 %S A337282 0,0,2,5,13,33,75,166,358,754,1564,3203,6491,13043,26021,51596,101772, %T A337282 199828,390790,761537,1479337,2865589,5536719,10673010,20530866, %U A337282 39417766,75545728,144551167,276172727,526908583,1003986313,1910718488,3632257048,6897610216,13085528650,24801630845,46966595909,88866759433 %N A337282 Partial sums of A337281. %D A337282 R. Schumacher, Explicit formulas for sums involving the squares of the first n Tribonacci numbers, Fib. Q., 58:3 (2020), 194-202. %H A337282 <a href="/index/Rec#order_07">Index entries for linear recurrences with constant coefficients</a>, signature (3,-1,-1,-3,1,1,1). %F A337282 From _Colin Barker_, Sep 13 2020: (Start) %F A337282 G.f.: x^2*(2 - x + x^3) / ((1 - x)*(1 - x - x^2 - x^3)^2). %F A337282 a(n) = 3*a(n-1) - a(n-2) - a(n-3) - 3*a(n-4) + a(n-5) + a(n-6) + a(n-7) for n>6. %F A337282 (End) %Y A337282 Cf. A000073, A337281. %K A337282 nonn %O A337282 0,3 %A A337282 _N. J. A. Sloane_, Sep 12 2020