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 A208261 #11 Nov 21 2013 13:07:47
%S A208261 1,121,1111,1331,1441,1661,1991,10201,11231,11341,11561,11671,12001,
%T A208261 12221,12661,12881,12991,13211,13231,13541,14201,14311,14531,14641,
%U A208261 14971,15191,15251,15851,15961,16181,16291,16621,16841,17161,17281,17611,17831,18271,18281
%N A208261 Nonprime numbers with all divisors starting and ending with digit 1.
%C A208261 Complement of A062332 with respect to A208262. Subsequence of A208260 (nonprime numbers starting and ending with digit 1).
%H A208261 Harvey P. Dale, <a href="/A208261/b208261.txt">Table of n, a(n) for n = 1..3000</a>
%e A208261 Divisors of 1111: 1, 11, 101, 1111.
%t A208261 Select[Table[n, {n, 20000}], ! PrimeQ[#] && Union[First /@ IntegerDigits[Divisors[#]]] == {1} && Union[Last /@ IntegerDigits[Divisors[#]]] == {1} &] (* _Vladimir Joseph Stephan Orlovsky_, Feb 26 2012 *)
%t A208261 d1Q[n_]:=Module[{idn=IntegerDigits[n]},First[idn]==Last[idn]==1]; Select[ Range[1,20000,10],!PrimeQ[#]&&Count[Divisors[#],_?d1Q] == DivisorSigma[ 0,#]&] (* _Harvey P. Dale_, Nov 23 2012 *)
%Y A208261 Cf. A208262 (numbers with all divisors starting and ending with digit 1), A062332 (primes starting and ending with digit 1).
%K A208261 nonn,base
%O A208261 1,2
%A A208261 _Jaroslav Krizek_, Feb 24 2012