A059249 Tersum n + (n-1); write n and n-1 in base 3 and add mod 3 with no carries.

1, 0, 5, 7, 6, 2, 4, 3, 17, 19, 18, 23, 25, 24, 20, 22, 21, 8, 10, 9, 14, 16, 15, 11, 13, 12, 53, 55, 54, 59, 61, 60, 56, 58, 57, 71, 73, 72, 77, 79, 78, 74, 76, 75, 62, 64, 63, 68, 70, 69, 65, 67, 66, 26, 28, 27, 32, 34, 33, 29, 31, 30, 44, 46, 45, 50, 52, 51, 47, 49, 48, 35

Offset

1,3

Links

Alois P. Heinz, Table of n, a(n) for n = 1..19682

Example

a(21)=14 since 21 and 20 are written in base 3 as 210 and 202 and so their tersum is 112 in base 3, i.e. 9+3+2=14.

Crossrefs

Cf. A004482, A004488, A004489, A038712.

Sequence in context: A347901 A145577 A144478 * A175294 A196615 A374967

Adjacent sequences: A059246 A059247 A059248 * A059250 A059251 A059252

Keyword

nonn,look

Author

Henry Bottomley, Jan 22 2001

Status

approved