OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
MATHEMATICA
Total/@Subsets[10^Range[0, 6], {4}]//Union (* Harvey P. Dale, Nov 07 2021 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
Offset corrected by Amiram Eldar, Jul 12 2022
STATUS
approved