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 A080466 #13 Oct 01 2024 15:45:33
%S A080466 121,143,165,187,341,363,385,561,583,781,1012,1034,1056,1078,1210,
%T A080466 1232,1254,1276,1298,1430,1452,1474,1496,1650,1672,1694,1870,1892,
%U A080466 3014,3036,3058,3212,3234,3256,3278,3410,3432,3454,3476,3498,3630,3652,3674,3696
%N A080466 Multiples of 11 in which the even positioned digits from left are even and the odd positioned ones are odd.
%H A080466 Robert Israel, <a href="/A080466/b080466.txt">Table of n, a(n) for n = 1..10000</a>
%p A080466 filter:= proc(n) local L,L1,L2;
%p A080466 L:= convert(n,base,10);
%p A080466 L1:= {seq(L[-i],i=2..nops(L),2)};
%p A080466 L2:= {seq(L[-i],i=1..nops(L),2)};
%p A080466 andmap(type,L1,even) and andmap(type,L2,odd)
%p A080466 end proc:
%p A080466 select(filter, [seq(i,i=11..10000,11)]); # _Robert Israel_, Mar 06 2018
%Y A080466 Intersection of A008593 and A376692.
%Y A080466 Cf. A080467.
%K A080466 base,nonn,look
%O A080466 1,1
%A A080466 _Amarnath Murthy_, Mar 02 2003
%E A080466 More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 06 2003