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 A236844 #20 Mar 13 2014 14:26:59 %S A236844 5,10,15,17,20,23,29,30,34,35,40,43,45,46,51,53,58,60,65,68,69,70,71, %T A236844 79,80,83,85,86,89,90,92,95,101,102,105,106,107,113,116,119,120,125, %U A236844 127,129,130,135,136,138,139,140,142,149,151,153,155,158,159,160,161 %N A236844 Numbers that do not occur as results of "upward" remultiplication (GF(2)[X] -> N) of any number; numbers not present in A234742. %C A236844 Numbers that do not occur in A234742 (A236842). %C A236844 This is a subsequence of A236848, thus all terms are divisible by at least one such prime which is reducible as polynomial over GF(2) (i.e. one of the primes in A091209). %C A236844 A236835(7)=27 is the first member of A236835 which does not occur here. a(12)=43 is the first term here which does not occur in A236835. %H A236844 Antti Karttunen, <a href="/A236844/b236844.txt">Table of n, a(n) for n = 1..19282</a> %F A236844 For all n, A236379(a(n)) > 0. %o A236844 (Scheme, with _Antti Karttunen_'s IntSeq-library, two variants) %o A236844 (define A236844 (ZERO-POS 1 0 A236853)) %o A236844 (define A236844 (ZERO-POS 1 0 A236862)) %Y A236844 Complement: A236842. %Y A236844 A setwise difference of A236848 and A236849. %Y A236844 A091209 is a subsequence. %Y A236844 Positions of zeros in A236853, A236846, A236847 and A236862. %Y A236844 Cf. A236845. %Y A236844 Cf. also A236834. %K A236844 nonn %O A236844 1,1 %A A236844 _Antti Karttunen_, Jan 31 2014