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 A257678 #6 May 05 2015 13:59:01 %S A257678 0,1,2,3,6,7,10,14,15,18,22,30,31,34,38,62,63,66,70,126,127,130,134, %T A257678 217,254,255,258,262,345,409,510,511,514,518,601,665,793,1022,1023, %U A257678 1026,1030,1113,1177,1305,1561,2046,2047,2050,2054,2137,2201,2329,2585,3097,3832,3833,4094,4095 %N A257678 Fixed points of A257676 and A257677. %C A257678 Those n for which A257676(n) = n. %H A257678 Antti Karttunen, <a href="/A257678/b257678.txt">Table of n, a(n) for n = 1..678</a> %o A257678 (Scheme, with _Antti Karttunen_'s IntSeq-library) %o A257678 (define A257678 (FIXED-POINTS 1 0 A257676)) %Y A257678 Subsequence: A000225. %Y A257678 Cf. A257676, A257677. %K A257678 nonn %O A257678 1,3 %A A257678 _Antti Karttunen_, May 04 2015