

A073143


Numbers k such that A073142(n) = f^k(A073142(n)), where f: m > m  reverse(m).


3




OFFSET

1,2


COMMENTS

Presumably a(6) = 17. a(n) is the length of the periodic part (cf. A072137) of the trajectory of A073142(n). Question: Does every k > 0 appear in this sequence?


LINKS

Table of n, a(n) for n=1..5.


EXAMPLE

a(3) = 14 since A073142(2) = 11436678 is the smallest solution of x = f^14(x).


CROSSREFS

Cf. A072137, A072141, A072142, A072143, A072718, A072719, A073142, A073144.
Sequence in context: A052213 A280074 A086263 * A066613 A074312 A061426
Adjacent sequences: A073140 A073141 A073142 * A073144 A073145 A073146


KEYWORD

base,more,nonn


AUTHOR

Klaus Brockhaus, Jul 17 2002


EXTENSIONS

Offset changed by N. J. A. Sloane, Dec 01 2007


STATUS

approved



