OFFSET
1,1
COMMENTS
EXAMPLE
9 = 6+2+1
33 = 30+2+1
37 = 30+6+1
38 = 30+6+2
213 = 210+2+1
MATHEMATICA
Take[Total/@Subsets[Join[{1}, FoldList[Times, Prime[Range[10]]]], {3}]// Union, 40] (* Harvey P. Dale, Nov 07 2017 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jonathan Vos Post, May 11 2010
STATUS
approved