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 A252912 #5 Dec 26 2014 15:45:33 %S A252912 1,22,23,87,88,108,117,119,125,127,130,132,133,134,135,136,137,138, %T A252912 139,140,141,142,143,144,145,146,147,148,149,151,153,154,155,156,157, %U A252912 158,159,160,161,162,163,339,795,905,1170,1386,1981,1985,2092,2525,3248 %N A252912 Numbers m such that A098550(m) = A251555(m). %H A252912 Reinhard Zumkeller, <a href="/A252912/b252912.txt">Table of n, a(n) for n = 1..250</a> %o A252912 (Haskell) %o A252912 a252912 n = a252912_list !! (n-1) %o A252912 a252912_list = filter (\x -> a098550 x == a251555 x) [1..] %Y A252912 Cf. A098550, A251555, A252939 (first differences). %K A252912 nonn %O A252912 1,2 %A A252912 _Reinhard Zumkeller_, Dec 25 2014