0,1
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.
Sequence in context: A133236 A038322 A090075 this_sequence A072208 A165943 A038323
Adjacent sequences: A004497 A004498 A004499 this_sequence A004501 A004502 A004503
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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