%I A064660
%S A064660 1,1,2,3,4,6,8,11,15,22,30,39,53,75,106,151
%N A064660 Form a conjugate partition of row with 1 in first row. all other rows 
               are the union of their parents. n-th row sum is equal to 2^(n-1). 
               The largest part of n-th row is A000045(n). a(n) = number of types 
               of piles in n-th row.
%e A064660 (first row: 1 and the other conjugate partition is 1; 2nd row is union 
               of 1 and 1.) (2nd row: 1+1 and the other conjugate partition is 2; 
               3rd row is union of 1+1 and 2.) (3rd row: 2+1+1 and the other conjugate 
               partition is 3+1; 4th row is union of 2+1+1 and 3+1.)
%Y A064660 Cf. A000700, A000701, A000045.
%Y A064660 Sequence in context: A064323 A003411 A034081 this_sequence A066806 A057048 
               A017911
%Y A064660 Adjacent sequences: A064657 A064658 A064659 this_sequence A064661 A064662 
               A064663
%K A064660 easy,nonn
%O A064660 1,3
%A A064660 Naohiro Nomoto (n_nomoto(AT)yabumi.com), Feb 14 2002