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 A262504 #7 Oct 02 2015 12:10:51 %S A262504 1,2,4,4,6,6,8,9,10,12,12,12,12,12,16,16,16,16,18,18,18,20,20,20,20, %T A262504 20,20,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,30,30,30,30,32,32, %U A262504 32,32,32,32,32,32,32,32,32,32,32,36,36,36,36,36,36,36,36,36,36,36,36,40,40,40,40,40,40,40,40,40,40,40,40,40,40,40,40,40,40,40,40,40,48 %N A262504 First differences of A262502. %C A262504 Which of the terms of A002183 occur here, and for how many times each? %H A262504 Antti Karttunen, <a href="/A262504/b262504.txt">Table of n, a(n) for n = 0..1024</a> %F A262504 a(n) = A262502(n+1) - A262502(n). %o A262504 (Scheme) (define (A262504 n) (- (A262502 (+ 1 n)) (A262502 n))) %Y A262504 Cf. A262502, A002183. %K A262504 nonn %O A262504 0,2 %A A262504 _Antti Karttunen_, Sep 24 2015