%I A014643
%S A014643 1,1,1,2,1,2,2,1,2,2,3,3,1,2,2,3,3,4,4,4,5,5,5,
%T A014643 1,2,2,3,3,4,4,4,5,5,5,6,6,6,6,7,7,7,7,8,8,8,8,9,9,9,9,9,10,10,10,10,10,
%U A014643 11,11,11,11,11
%N A014643 Triangular array starting with {1,1}; then i-th term in a row gives number 
               of i's in next row.
%e A014643 {1,1},{1,2},{1,2,2},{1,2,2,3,3},...
%Y A014643 Cf. A014644, A011784. Rows converge to A001462.
%Y A014643 Sequence in context: A007895 A053260 A140223 this_sequence A118382 A007723 
               A067437
%Y A014643 Adjacent sequences: A014640 A014641 A014642 this_sequence A014644 A014645 
               A014646
%K A014643 tabl,nonn
%O A014643 1,4
%A A014643 N. J. A. Sloane (njas(AT)research.att.com).
%E A014643 More terms from Patrick De Geest (pdg(AT)worldofnumbers.com)