Voozh

A026346

a(n) = a(m) if a(m) has already occurred exactly once and n = a(m)+[ 3m/2 ], else a(n) = least positive integer that has not yet occurred.

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