OFFSET
0,2
COMMENTS
If one counts all subsets S of T={0,1,2,...n} such that each number in T is the sum of two elements of S, sequence A066062 is obtained.
EXAMPLE
For n=2, it is clear that S={0,1} is the unique subset of {0,1,2} that satisfies the definition, so a(2)=2.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
John W. Layman, Dec 01 2001
EXTENSIONS
a(27)-a(50) from Rob Pratt, Aug 13 2020
STATUS
approved