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 A250039 #23 Jan 29 2015 09:17:59
%S A250039 2,3,4,5,6,7,8,9,10,11,12,13,14,15,32,34,36,38,40,42,44,46,48,51,54,
%T A250039 57,60,63,64,66,68,70,72,74,76,78,80,85,90,95,96,98,99,100,102,104,
%U A250039 105,106,108,110,111,112,119,126,128,130,132,134,136,138,140,142
%N A250039 Numbers n such that m = floor(n/16) is not coprime to n and, if nonzero, m is also a term of the sequence.
%C A250039 See the comments in A250041 which all apply, except for the setting of the base, b=16. In particular, they define the property RTNC(b).
%C A250039 This list is an infinite subset of A248502 with which it shares the first 111 entries.
%H A250039 Stanislav Sykora, <a href="/A250039/b250039.txt">Table of n, a(n) for n = 1..10000</a>
%H A250039 Stanislav Sykora, <a href="https://oeis.org/wiki/File:GeneticThreads.txt">PARI/GP scripts for genetic threads</a>, with code and comments.
%H A250039 Wikipedia, <a href="http://en.wikipedia.org/wiki/Coprime_integers">Coprime integers</a>
%o A250039 (PARI) See the link.
%o A250039 (PARI) is_rtnc(n, b=16) = {while (((m=gcd(n\b, n)) != 1), if (m == 0, return (1)); n = n\b; ); return (0); } \\ _Michel Marcus_, Jan 29 2015
%Y A250039 Cf. A248502, A250038, A250041.
%Y A250039 Other lists of right-truncatable numbers with the property RTNC(b): A005823 (b=3), A250037 (b=4), A250041 (b=10), A250043 (b=9), A250045 (b=8), A250047 (b=7), A250049 (b=6), A250051 (b=5).
%K A250039 nonn,base
%O A250039 1,1
%A A250039 _Stanislav Sykora_, Dec 07 2014