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 A051788 #2 May 16 2003 03:00:00 %S A051788 1,3,4,8,14,22,31,46,62,82,108,137,149,171,206,259,303,367,414,479, %T A051788 545,578,658,728,848,921,1004,1130,1268,1352,1454,1584,1669,1876,1915, %U A051788 2114,2303,2404,2563,2797,2991,3112,3270,3423,3592,3773,3889,4284,4727,4819 %N A051788 a(1) = 1, a(2) = 3; for n>2, a(n) = least value > a(n-1) such that pairwise differences are unique. %C A051788 A variation on A005282 (Mian-Chowla, where sums of pairs of elements are unique). %Y A051788 Cf. A005282, A080201 (for differences that do not occur). %K A051788 nonn %O A051788 1,2 %A A051788 Gerald A. Mischke (Gerald.Mischke(AT)mutualofomaha.com), Dec 09 1999