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 A071344 #5 Oct 19 2017 03:14:02 %S A071344 1,2,9,14,21,29,41,62,74,89,101,134,161,194,209,230,269,314,341,374, %T A071344 425,446,521,569,614,629,689,761,794,866,941,941,941,1154,1154,1286, %U A071344 1361,1361,1454,1454,1634,1634,1781,1889,1889,2054,2141,2246,2246 %N A071344 a(n) = greatest positive r <= n, such that the origin-centered sphere of radius sqrt(r) touches A071342(n) lattice points. %e A071344 a(4)=21 because the largest sphere with radius <= 4 to touch A071342(4)=48 points has radius sqrt(21). %o A071344 (FORTRAN) See A071339. %Y A071344 Cf. A071339-A071347. %K A071344 easy,nonn %O A071344 1,2 %A A071344 _Hugo Pfoertner_, May 22 2002 %E A071344 Edited by _Don Reble_, Nov 06 2005