OFFSET
0,4
EXAMPLE
The partitions of 4 are (4), (3,1), (2,2), (2,1,1), (1,1,1,1), with respective binary ranks 8, 5, 4, 4, 4, so a(4) = 3.
MATHEMATICA
Table[Length[Union[Total[2^(#-1)]&/@IntegerPartitions[n]]], {n, 0, 15}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Gus Wiseman, May 26 2024
STATUS
approved