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 A236835 #7 Mar 13 2014 14:26:22 %S A236835 5,10,15,17,20,23,27,29,30,34,39,40,45,46,51,53,54,57,58,60,65,68,71, %T A236835 75,78,80,83,85,90,92,95,99,101,102,105,106,107,108,113,114,116,119, %U A236835 120,127,129,130,135,136,139,141,142,147,150,151,153,156,160,163,165 %N A236835 Numbers that occur in more than one way as results of "downward" remultiplication (N -> GF(2)[X]) of some number. %C A236835 Numbers that occur more than once in A234741. %H A236835 Antti Karttunen, <a href="/A236835/b236835.txt">Table of n, a(n) for n = 1..3385</a> %F A236835 For all n, A236379(a(n)) > 0. %e A236835 5 occurs here, because it occurs in A234741 both as A234741(5)=5 and A234741(9)=5, as A048720(3,3)=5. %e A236835 43 do not occur here, as although it is a term of A091209, it only occurs at A234741(43) as it cannot be obtained by other means as a carryless product than as 43 = A048720(3,25). %o A236835 (Scheme, with _Antti Karttunen_'s IntSeq-library) %o A236835 (define A236835 (MATCHING-POS 1 0 (lambda (n) (> (A236833 n) 1)))) %Y A236835 Positions of terms larger than one in A236833. %Y A236835 Cf. A236833, A236834. A091209 is NOT a subsequence. %K A236835 nonn %O A236835 1,1 %A A236835 _Antti Karttunen_, Jan 31 2014