A026358 a(n) = a(m) if a(m) has already occurred exactly once and n = a(m)+2m-2, else a(n) = least positive integer that has not yet occurred.

1, 2, 3, 2, 4, 5, 3, 6, 7, 8, 9, 4, 10, 11, 5, 12, 13, 14, 15, 6, 16, 17, 7, 18, 19, 8, 20, 21, 9, 22, 23, 24, 25, 10, 26, 27, 11, 28, 29, 30, 31, 12, 32, 33, 13, 34, 35, 14, 36, 37, 15, 38, 39, 40, 41, 16, 42, 43, 17, 44, 45, 46, 47, 18, 48, 49

Offset

1,2

Links

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

Crossrefs

Sequence in context: A285904 A285714 A161908 * A304098 A239690 A208460

Adjacent sequences: A026355 A026356 A026357 * A026359 A026360 A026361

Keyword

nonn

Author

Clark Kimberling

Status

approved