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 A323046 #27 Jun 11 2019 08:48:57
%S A323046 23,46,47,53,61,69,71,77,79,92,94,95,101,103,106,107,115,119,121,122,
%T A323046 125,127,133,138,139,141,142,143,149,151,154,157,158,159,161,167,169,
%U A323046 173,175,179,181,183,184,185,187,188,190,191,197,199,202,203,205,206,207,211,212,213,214,215,221,223,227,229,230,231,233
%N A323046 Numbers that are neither 3-smooth nor a sum of two 3-smooth numbers.
%H A323046 Robert Israel, <a href="/A323046/b323046.txt">Table of n, a(n) for n = 1..10000</a>
%e A323046 23 is not in A003586; also 22 (23-1), 21 (23-2), 20 (23-3), 19 (23-2*2), 17 (23-2*3), 15 (23-2*2*2), 14 (23-3*3), 11 (23-2*2*3), 7 (23-2*2*2*2), 5 (23-2*3*3) are not in A003586.
%p A323046 N:= 1000: # to get all terms <= N
%p A323046 S:= {seq(seq(2^i*3^j,i=0..ilog2(N/3^j)),j=0..floor(log[3](N)))}:
%p A323046 sort(convert({$1..N} minus S minus map(t -> op(map(`+`, S,t)), S), list)); # _Robert Israel_, May 19 2019
%Y A323046 Cf. A003586, A237442, A323047, A323049, A323050. Subsequence of A081329.
%K A323046 nonn
%O A323046 1,1
%A A323046 _Carlos Alves_, Jan 03 2019