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 A178419 #16 Apr 15 2024 07:01:00
%S A178419 0,1,3,6,11,17,24,32,43,57,72,95,119,151,207,303,431,655,1039,1551,
%T A178419 2447,3983,6031,9615,15759,23951,38287,62863,95631,152975,251279,
%U A178419 382351,611727,1004943,1529231,2446735,4019599,6116751,9786767,16078223
%N A178419 Partial sums of A006431.
%H A178419 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (1,0,4,-4).
%F A178419 a(n) = Sum_{i=1..n} A006431(i).
%F A178419 G.f.: -x^2*(36*x^13 +28*x^12 +32*x^11 +21*x^10 +17*x^9 +14*x^8 +13*x^7 +12*x^6 +5*x^5 +2*x^4 -x^3 -3*x^2 -2*x -1) / ((x -1)*(4*x^3 -1)). - _Colin Barker_, Apr 20 2013
%Y A178419 Cf. A006431.
%K A178419 nonn,easy
%O A178419 1,3
%A A178419 _Jonathan Vos Post_, May 27 2010