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.

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

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