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A004496
Tersum n + 7.
2
7, 8, 6, 1, 2, 0, 4, 5, 3, 16, 17, 15, 10, 11, 9, 13, 14, 12, 25, 26, 24, 19, 20, 18, 22, 23, 21, 34, 35, 33, 28, 29, 27, 31, 32, 30, 43, 44, 42, 37, 38, 36, 40, 41, 39, 52, 53, 51, 46, 47, 45, 49, 50, 48, 61, 62, 60, 55
OFFSET
0,1
FORMULA
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.
MATHEMATICA
LinearRecurrence[{1, 0, 0, 0, 0, 0, 0, 0, 1, -1}, {7, 8, 6, 1, 2, 0, 4, 5, 3, 16}, 80] (* Jinyuan Wang, Mar 10 2020 *)
CROSSREFS
Sequence in context: A117239 A198365 A262898 * A197762 A181624 A277683
KEYWORD
nonn,easy
STATUS
approved