Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #16 Apr 15 2024 07:01:00
%S 0,1,3,6,11,17,24,32,43,57,72,95,119,151,207,303,431,655,1039,1551,
%T 2447,3983,6031,9615,15759,23951,38287,62863,95631,152975,251279,
%U 382351,611727,1004943,1529231,2446735,4019599,6116751,9786767,16078223
%N Partial sums of A006431.
%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (1,0,4,-4).
%F a(n) = Sum_{i=1..n} A006431(i).
%F 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 Cf. A006431.
%K nonn,easy
%O 1,3
%A _Jonathan Vos Post_, May 27 2010