%I A013921
%S A013921 4,10,18,27,49,63,78,94,112,132,153,175,224,250,305,335,400,434,469,505,
%T A013921 543,582,622,664,708,753,799,847,896,946,1158,1214,1271,1329,1389,1514,
%U A013921 1578,1643,1846,1916,1988,2062,2290,2368,2448,2529,2611,2695,2780,2866
%N A013921 a(n) is composite and is sum of first k composites for some k.
%Y A013921 Cf. A013919, A013920.
%Y A013921 Sequence in context: A048218 A009876 A161958 this_sequence A028552 A009877 
               A009880
%Y A013921 Adjacent sequences: A013918 A013919 A013920 this_sequence A013922 A013923 
               A013924
%K A013921 nonn
%O A013921 1,1
%A A013921 N. J. A. Sloane (njas(AT)research.att.com), Henri Lifchitz (100637.64(AT)CompuServe.COM)
%E A013921 More terms from David W. Wilson (davidwwilson(AT)comcast.net)