A080466 Multiples of 11 in which the even positioned digits from left are even and the odd positioned ones are odd.

121, 143, 165, 187, 341, 363, 385, 561, 583, 781, 1012, 1034, 1056, 1078, 1210, 1232, 1254, 1276, 1298, 1430, 1452, 1474, 1496, 1650, 1672, 1694, 1870, 1892, 3014, 3036, 3058, 3212, 3234, 3256, 3278, 3410, 3432, 3454, 3476, 3498, 3630, 3652, 3674, 3696

Offset: 1

Author

Amarnath Murthy, Mar 02 2003

Keywords

• base
• nonn
• look

Links

• Robert Israel, Table of n, a(n) for n = 1..10000

Crossrefs

Intersection of A008593 and A376692.

Cf. A080467.

Programs

Maple

filter:= proc(n) local L,L1,L2;
L:= convert(n,base,10);
L1:= {seq(L[-i],i=2..nops(L),2)};
L2:= {seq(L[-i],i=1..nops(L),2)};
andmap(type,L1,even) and andmap(type,L2,odd)
end proc:
select(filter, [seq(i,i=11..10000,11)]); # Robert Israel, Mar 06 2018

Extensions

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