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 A054405 #16 Jun 13 2015 00:50:14 %S A054405 1,2,3,5,7,10,14,19,26,35,47,63,84,112,149,198,263,349,463,614,814, %T A054405 1079,1430,1895,2511,3327,4408,5840,7737,10250,13579,17989,23831, %U A054405 31570,41822,55403,73394,97227,128799,170623,226028,299424 %N A054405 Row sums of array T as in A055215. %C A054405 Partial sums of A134816. [From _Omar E. Pol_, Jan 02 2009] %H A054405 <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (1,1,0,-1). %F A054405 If you add 2 to each term, you get the Padovan sequence A000931. - Gabriel Nivasch (gnivasch(AT)yahoo.com), Oct 15 2003 %F A054405 Partial sums of Padovan sequence A000931(n+5). G.f. : (1+x)/(1-x-x^2+x^4); a(n)=a(n-1)+a(n-2)-a(n-4). - _Paul Barry_, Jun 21 2004, sign corrected R. J. Mathar, Oct 16 2010 %Y A054405 Cf. A134816. [From _Omar E. Pol_, Jan 02 2009] %K A054405 nonn %O A054405 0,2 %A A054405 _Clark Kimberling_, May 07 2000 %E A054405 Signs in formula corrected by _R. J. Mathar_, Oct 16 2010