OFFSET
1,1
COMMENTS
Arises in analyzing A151755.
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
MAPLE
N:= 8: # for terms <= 2^(N+1)
Res1:= {seq(2^i, i=2..N)}:
Res2:= {seq(seq(2^i+2^j, i=1..j-1), j=2..N)}:
Res3:= {seq(seq(seq(2^i+2^j+2^k, i=0..j-1), j=1..k-1), k=2..N)}:
sort(convert(Res1 union Res2 union Res3, list)); # Robert Israel, Mar 27 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jun 21 2009
STATUS
approved