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 A234533 #10 Jan 08 2014 03:04:08 %S A234533 1,2,3,4,5,6,1,2,3,4,5,6,7,2,3,4,5,6,1,2,3,4,5,6,7,2,3,4,5,6,7,8,3,4, %T A234533 5,6,1,2,3,4,5,6,7,2,3,4,5,6,7,8,3,4,5,6,7,2,3,4,5,6,1,2,3,4,5,6,7,2, %U A234533 3,4,5,6,7,2,3,4,5,6,7,2,3,4,5,6,7,8,3 %N A234533 Smallest number of hex numbers summing to n. %C A234533 This sequence is to A003215 as A002828 is to A000290, and as A061336 is to A000217. %H A234533 Lars Blomberg, <a href="/A234533/b234533.txt">Table of n, a(n) for n = 1..10000</a> %e A234533 a(21) = 3, because 21 = 19 + 1 + 1 = 7 + 7 + 7, so there are two ways to express 21 as the sum of 3 hex numbers, but no way to express 21 as the sum of 2 hex numbers. %K A234533 nonn %O A234533 1,2 %A A234533 _Allan C. Wechsler_, Dec 27 2013 %E A234533 a(27)-a(87) from _Lars Blomberg_, Jan 07 2014