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A038446
Sums of 4 distinct powers of 10.
18
1111, 10111, 11011, 11101, 11110, 100111, 101011, 101101, 101110, 110011, 110101, 110110, 111001, 111010, 111100, 1000111, 1001011, 1001101, 1001110, 1010011, 1010101, 1010110, 1011001, 1011010, 1011100, 1100011, 1100101, 1100110, 1101001, 1101010, 1101100, 1110001
OFFSET
1,1
LINKS
MATHEMATICA
Total/@Subsets[10^Range[0, 6], {4}]//Union (* Harvey P. Dale, Nov 07 2021 *)
CROSSREFS
KEYWORD
nonn,easy
EXTENSIONS
Offset corrected by Amiram Eldar, Jul 12 2022
STATUS
approved