A026342 a(n) = a(m) if a(m) has already occurred exactly once and n = m+[ (m+1)/2 ], else a(n) = least positive integer that has not yet occurred.

1, 1, 2, 3, 2, 3, 4, 5, 6, 7, 4, 5, 8, 6, 7, 9, 10, 11, 12, 8, 13, 14, 15, 9, 16, 10, 11, 17, 12, 18, 19, 13, 14, 20, 15, 21, 22, 16, 23, 24, 25, 17, 26, 27, 18, 28, 19, 29, 30, 31, 20, 32, 33, 21, 34, 22, 35, 36, 23, 24, 37, 25, 38, 39, 26, 27

Offset

1,3

Links

Table of n, a(n) for n=1..66.

Crossrefs

Sequence in context: A327666 A286717 A162751 * A275727 A255395 A175266

Adjacent sequences: A026339 A026340 A026341 * A026343 A026344 A026345

Keyword

nonn

Author

Clark Kimberling

Status

approved