0,3

Some numbers occur more than once, but they are sparse.

Table of n, a(n) for n=0..73.

Tersum m + n: write m and n in base 3 and add mod 3 with no carries, e.g. 5 + 8 = "21" + "22" = "10" = 1. See A004482 for references.

Cf. A004482.

Sequence in context: A026257 A099520 A159958 * A105529 A120237 A026182

Adjacent sequences: A071767 A071768 A071769 * A071771 A071772 A071773

nonn

Paul D. Hanna, Jun 04 2002

approved