OFFSET
1,1
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
MAPLE
seq(seq(11^i+11^j, i=0..j-1), j=1..10); # Robert Israel, Jun 21 2018
MATHEMATICA
Take[Union[Plus@@@Subsets[11^Range[0, 20], {2}]], 50] (* Harvey P. Dale, Dec 16 2010 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
More terms from Vincenzo Librandi, Aug 06 2009
a(33)=214373522 inserted by Robert Israel, Jun 21 2018
STATUS
approved