cp's OEIS Frontend

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.

A208262 Numbers with all divisors starting and ending with digit 1.

This page as a plain text file.
%I A208262 #9 Nov 21 2013 13:07:47
%S A208262 1,11,101,121,131,151,181,191,1021,1031,1051,1061,1091,1111,1151,1171,
%T A208262 1181,1201,1231,1291,1301,1321,1331,1361,1381,1441,1451,1471,1481,
%U A208262 1511,1531,1571,1601,1621,1661,1721,1741,1801,1811,1831,1861,1871,1901,1931,1951,1991
%N A208262 Numbers with all divisors starting and ending with digit 1.
%C A208262 Union of A062332 and A208261. Subsequence of A208259 (numbers starting and ending with digit 1).
%e A208262 Divisors of 1111: 1, 11, 101, 1111.
%t A208262 Select[Table[n, {n, 2000}], Union[First /@ IntegerDigits[Divisors[#]]] == {1} && Union[Last /@ IntegerDigits[Divisors[#]]] == {1} &] (* _Vladimir Joseph Stephan Orlovsky_, Feb 26 2012 *)
%Y A208262 Cf. A062332 (primes starting and ending with digit 1), A208261 (nonprime numbers with all divisors starting and ending with digit 1).
%K A208262 nonn,base
%O A208262 1,2
%A A208262 _Jaroslav Krizek_, Feb 24 2012