A004494 Tersum n + 5.

5, 3, 4, 8, 6, 7, 2, 0, 1, 14, 12, 13, 17, 15, 16, 11, 9, 10, 23, 21, 22, 26, 24, 25, 20, 18, 19, 32, 30, 31, 35, 33, 34, 29, 27, 28, 41, 39, 40, 44, 42, 43, 38, 36, 37, 50, 48, 49, 53, 51, 52, 47, 45, 46, 59, 57, 58, 62, 60, 61, 56, 54, 55, 68, 66, 67, 71, 69

Offset

0,1

Links

Table of n, a(n) for n=0..67.

Index entries for linear recurrences with constant coefficients, signature (1,0,0,0,0,0,0,0,1,-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}, {5, 3, 4, 8, 6, 7,
2, 0, 1, 14}, 80] (* Jinyuan Wang, Mar 10 2020 *)

Prog

(Python) # T(n, m) in A004489
def a(n): return T(n, 5)
print([a(n) for n in range(68)]) # Michael S. Branicky, May 03 2021

Crossrefs

Cf. A004489.

Sequence in context: A104183 A198563 A111889 * A193090 A004162 A319053

Adjacent sequences: A004491 A004492 A004493 * A004495 A004496 A004497

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved