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 A071377 #10 Jan 08 2024 09:01:18 %S A071377 1,2,3,4,5,6,6,7,8,9,10,11,12,13,13,14,15,16,17,18,19,20,20,21,22,23, %T A071377 24,24,25,26,26,27,28,29,30,31,32,33,33,34,35,36,37,38,39,40,40,41,42, %U A071377 43,44,45,46,47,47,48,49,50,51,51,52,53,53,54,55,56 %N A071377 Number of positive integers <= n which are the sum of 3 squares. %C A071377 Sequence is 2-regular. %H A071377 J.-P. Allouche and J. Shallit, <a href="https://www.cs.uwaterloo.ca/~shallit/Papers/as0.ps">The ring of k-regular sequences</a>, preprint. %H A071377 J.-P. Allouche and J. Shallit, <a href="https://doi.org/10.1016/0304-3975(92)90001-V">The ring of k-regular sequences</a>, Theoretical Computer Sci., Vol. 98 (1992), pp. 163-197. %Y A071377 Partial sums of A071374 (with its zeroth term omitted). %K A071377 nonn %O A071377 0,2 %A A071377 _N. J. A. Sloane_, Jun 12 2002