A081852 Consider recurrence b(0) = n/3, b(n) = b(0)*ceiling(b(n-1)); sequence gives first integer reached (or -1 if no integer is ever reached).

1, 4, 20, 2, 7, 8, 3, 26631380, 55, 4, 416, 112, 5, 32, 34, 6, 285, 13960, 7, 67358874, 214544, 8, 75, 78, 9, 62186796, 7399041846, 10, 1178, 173857344, 11, 136, 140, 12, 24494, 2090, 13, 78824360, 2624, 14, 215, 220, 15, 3772, 61617, 16, 23001295794169, 78900, 17, 312

Offset

3,2

Links

Table of n, a(n) for n=3..52.

Crossrefs

Cf. A073524, A081849, A081850, A081851. A074078 gives number of steps to reach an integer.

Sequence in context: A364519 A104159 A039921 * A050017 A125514 A118392

Adjacent sequences: A081849 A081850 A081851 * A081853 A081854 A081855

Keyword

nonn

Author

N. J. A. Sloane, Apr 13 2003

Status

approved