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 A270420 #7 May 27 2016 21:12:19 %S A270420 2,3,4,5,6,7,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,28, %T A270420 29,30,31,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52, %U A270420 53,55,56,57,58,59,60,61,62,63,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81 %N A270420 Numbers n for which A270418(n) > A270419(n). %H A270420 Antti Karttunen, <a href="/A270420/b270420.txt">Table of n, a(n) for n = 1..10000</a> %o A270420 (Scheme, with _Antti Karttunen_'s IntSeq-library) %o A270420 (define A270420 (MATCHING-POS 1 1 (lambda (n) (> (A270418 n) (A270419 n))))) %Y A270420 Complement: A270421 (apart from 1 which is in neither sequence). %Y A270420 Cf. A270428 (a subsequence after initial 1). %Y A270420 Cf. A270418, A270419. %K A270420 nonn %O A270420 1,1 %A A270420 _Antti Karttunen_, May 23 2016