A026370 a(n) = a(m) if a(m) has already occurred exactly once and n = a(m)+2m+1, else a(n) = least positive integer that has not yet occurred.

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

Offset

1,2

Links

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

Crossrefs

Sequence in context: A285715 A328456 A253887 * A078446 A357241 A055447

Adjacent sequences: A026367 A026368 A026369 * A026371 A026372 A026373

Keyword

nonn

Author

Clark Kimberling

Status

approved