A098187 Initial seeds x which will enter a cycle of length 4 under the iteration of x -> A063919(x), the sum of proper unitary divisors.

81570, 114270, 137046, 169998, 177906, 182082, 182094, 185190, 194574, 194586, 201642, 203442, 204420, 204540, 212466, 212874, 213870, 219306, 219318, 230874, 231438, 231834, 231846, 232626, 237678, 238134, 242634, 258882, 259338, 259350

Offset

1,1

Comments

The sequence is the attractor-basin of set of {C4} cycles belonging to this iteration.

The {C4} attractor-set is displayed separately in A098188.

Links

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

Example

81570 is in the sequence because its track under the iterated map is 81570, 114270, 182082, 182094, 232626, 237678, 305682, 352878, 360978, 403662, 420738, [420750, 395730, 395910, 420570], 420750.., where the cycle is indicated by brackets. The 4 recurrent terms appear after 11 transients for this case.

Crossrefs

Cf. A098185, A098186, A002827, A097024, A097030.

Sequence in context: A237934 A134122 A138044 * A146025 A361934 A283418

Adjacent sequences: A098184 A098185 A098186 * A098188 A098189 A098190

Keyword

nonn

Author

Labos Elemer, Sep 02 2004

Status

approved