OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
MATHEMATICA
Take[Union[Total/@Subsets[10^Range[0, 15], {10}]], 20] (* Harvey P. Dale, Dec 19 2011 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
Offset changed to 1 by Ivan Neretin, Feb 28 2016
STATUS
approved