%I A005238 M5236
%S A005238 33,85,93,141,201,213,217,230,242,243,301,374,393,445,603,633,663,697,
%T A005238 902,921,1041,1105,1137,1261,1274,1309,1334,1345,1401,1641,1761,1832,
%U A005238 1837,1885,1893,1924,1941,1981,2013,2054,2101,2133,2181,2217,2264,2305
%N A005238 Numbers n such that n, n+1 and n+2 have the same number of divisors.
%D A005238 M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, 
               National Bureau of Standards Applied Math. Series 55, 1964 (and various 
               reprintings), p. 840.
%D A005238 J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 33, pp 12, Ellipses, 
               Paris 2008.
%D A005238 R. K. Guy, Unsolved Problems in Number Theory, B18.
%D A005238 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%H A005238 T. D. Noe, <a href="b005238.txt">Table of n, a(n) for n=1..1000</a>
%H A005238 M. Abramowitz and I. A. Stegun, eds., <a href="http://www.nrbook.com/
               abramowitz_and_stegun/">Handbook of Mathematical Functions</a>, National 
               Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 
               [alternative scanned copy].
%Y A005238 Cf. A000005, A005237, A006601, A049051, A006558, A019273, A039665.
%Y A005238 Sequence in context: A045939 A056809 A073251 this_sequence A052214 A063838 
               A075039
%Y A005238 Adjacent sequences: A005235 A005236 A005237 this_sequence A005239 A005240 
               A005241
%K A005238 nonn,easy,nice
%O A005238 1,1
%A A005238 N. J. A. Sloane (njas(AT)research.att.com).
%E A005238 More terms from Olivier Gerard.