A080466 - OEIS

%I #13 Oct 01 2024 15:45:33

%S 121,143,165,187,341,363,385,561,583,781,1012,1034,1056,1078,1210,

%T 1232,1254,1276,1298,1430,1452,1474,1496,1650,1672,1694,1870,1892,

%U 3014,3036,3058,3212,3234,3256,3278,3410,3432,3454,3476,3498,3630,3652,3674,3696

%N Multiples of 11 in which the even positioned digits from left are even and the odd positioned ones are odd.

%H Robert Israel, <a href="/A080466/b080466.txt">Table of n, a(n) for n = 1..10000</a>

%p filter:= proc(n) local L,L1,L2;

%p L:= convert(n,base,10);

%p L1:= {seq(L[-i],i=2..nops(L),2)};

%p L2:= {seq(L[-i],i=1..nops(L),2)};

%p andmap(type,L1,even) and andmap(type,L2,odd)

%p end proc:

%p select(filter, [seq(i,i=11..10000,11)]); # _Robert Israel_, Mar 06 2018

%Y Intersection of A008593 and A376692.

%Y Cf. A080467.

%K base,nonn,look

%O 1,1

%A _Amarnath Murthy_, Mar 02 2003

%E More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 06 2003