OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
bQ[n_]:=Module[{dcn=DigitCount[n, 11]}, dcn[[5]]==dcn[[9]]>0]; Select[ Range[ 1200], bQ] (* Harvey P. Dale, Oct 15 2011 *)
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
STATUS
approved