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A261660
In base 3, 0, together with numbers of the form i00j00k00m00... where i = 1 or 2 and j,k,m,... are 0, 1, or 2.
2
0, 1, 2, 10, 20, 100, 200, 1000, 1001, 1002, 2000, 2001, 2002, 10000, 10010, 10020, 20000, 20010, 20020, 100000, 100100, 100200, 200000, 200100, 200200, 1000000, 1000001, 1000002, 1001000, 1001001, 1001002, 1002000, 1002001, 1002002, 2000000, 2000001, 2000002, 2001000, 2001001, 2001002, 2002000, 2002001, 2002002
OFFSET
1,3
COMMENTS
A low density sequence with the property that every nonnegative integer is the sum of at most three terms.
REFERENCES
Veit Elser, Posting to Math Fun Mailing List, Aug 28 2015
CROSSREFS
Sequence in context: A298411 A324474 A294493 * A004643 A284213 A156818
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Aug 28 2015
STATUS
approved