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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 (list; graph; refs; listen; history; text; internal format)
 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 LINKS Table of n, a(n) for n=1..43. CROSSREFS Cf. A261661, A261662. Sequence in context: A298411 A324474 A294493 * A004643 A284213 A156818 Adjacent sequences: A261657 A261658 A261659 * A261661 A261662 A261663 KEYWORD nonn,base AUTHOR N. J. A. Sloane, Aug 28 2015 STATUS approved

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Last modified August 7 17:47 EDT 2024. Contains 375017 sequences. (Running on oeis4.)