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 A081929 #6 Jan 12 2023 16:29:09 %S A081929 1,22,64,127,211,316,442,589,757,946,1156,2467,3979,5692,7606,9721, %T A081929 12037,14554,17272,20191,23311,26632,30154,33877,37801,41926,46252, %U A081929 50779,55507,60436,65566,70897,76429,82162,88096,94231,100567,107104 %N A081929 Sum of the n-th row of A077339. %H A081929 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (3,-3,1). %F A081929 For n>10, a(n) = 1/2 * (201n^2 - 2001n + 2). %F A081929 From _Chai Wah Wu_, Jan 12 2023: (Start) %F A081929 a(n) = 3*a(n-1) - 3*a(n-2) + a(n-3) for n > 13. %F A081929 G.f.: x*(900*x^12 - 1080*x^11 - x^2 - 19*x - 1)/(x - 1)^3. (End) %Y A081929 Not the same as A069178 (A069178(12)=1387 <> 2467=a(12) ). Cf. A077339, A077340. %K A081929 base,easy,nonn %O A081929 1,2 %A A081929 _Amarnath Murthy_, Apr 01 2003 %E A081929 More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 19 2003