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1,2
See A173447 = the number of iterations for the map r -> A061602(r), A061602 = sum of factorials of the digits of n.
Superset of A014080 (factorions).
Table of n, a(n) for n=1..11.
Number 169 is in sequence because 169 -> 363601 -> 1454 -> 169.
Cf. A188283, A014080, A173447, A061602.
Sequence in context: A103207 A093002 A074319 * A228507 A254499 A071064
Adjacent sequences: A188281 A188282 A188283 * A188285 A188286 A188287
nonn,base
Jaroslav Krizek, Mar 26 2011
approved