%I A102461
%S A102461 1,2,5,16,56,120
%N A102461 Numbers n such that binomial(n,2) is in A027568.
%Y A102461 Cf. A027568.
%Y A102461 Sequence in context: A019988 A137732 A057973 this_sequence A052708 A149973 
               A149974
%Y A102461 Adjacent sequences: A102458 A102459 A102460 this_sequence A102462 A102463 
               A102464
%K A102461 nonn,fini,full
%O A102461 1,2
%A A102461 N. J. A. Sloane (njas(AT)research.att.com), Sep 06 2008