A119397 Numbers taking exactly 21 steps to reach 15 in A086793.

71820, 103950, 127764, 135660, 141360, 161460, 173250, 183744, 193284, 203580, 206712, 209440, 214830, 217620, 221760, 223020, 223860, 234432, 243540, 244440, 246330, 247752, 256680, 263160, 264180, 265200, 280368, 281160, 286380, 287712

Offset

1,1

Comments

Some trajectories are: 71820,1104,168,102,36,46,18,30,27,22,9,13,5,6,12,19,11,3,4,7,8,15 103950,1134,168,... 127764,924,168,... 135660,1134,168,... 221760,1908,162,66,36,... 343728,1650,162,... 376992,2016,297,66,36,... All trajectories eventually join one of previous trajectories. In the first 136 terms <800000 there is only one odd number, 628425. Next odd terms are: 824175, 1340325, 1422135, 1495725 (see A119398).

Links

Table of n, a(n) for n=1..30.

Crossrefs

Cf. A086793, A119396-A119415.

Sequence in context: A031865 A283955 A114661 * A025300 A025319 A097245

Adjacent sequences: A119394 A119395 A119396 * A119398 A119399 A119400

Keyword

base,nonn

Author

Zak Seidov, May 18 2006

Status

approved