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 A083489 #10 Apr 04 2015 21:34:04 %S A083489 4,2,8,2,3,6,2,3,4,6,2,3,4,6,9,2,3,5,6,8,10,2,3,4,5,6,8,10,2,3,4,5,6, %T A083489 8,9,10,2,3,4,5,6,7,9,10,14,2,3,4,5,7,8,9,10,12,14,2,3,4,5,6,7,8,9,12, %U A083489 14,15,2,3,4,5,6,7,8,9,12,14,15,16,2,3,4,6,7,8,9,10,12,14,15,16,18,2 %N A083489 Triangle read by rows where the n-th row gives the reverse-lexicographically earliest sequence of n distinct integers > 1 whose product equals the smallest possible square (=A081456(n)). %F A083489 Results from the triangle in A081454 by removing first column (equivalently, by removing all 1's from the sequence). %e A083489 4 %e A083489 2 8 %e A083489 2 3 6 %e A083489 2 3 4 6 %e A083489 2 3 4 6 9 %e A083489 2 3 5 6 8 10 %e A083489 ... %Y A083489 Cf. A081454, A086435, A081457. %K A083489 nonn,tabl %O A083489 1,1 %A A083489 _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 03 2003 %E A083489 Corrected by _R. J. Mathar_, Jul 18 2007 %E A083489 Corrected and extended by _Max Alekseyev_, Jul 16 2009