OFFSET
1,1
COMMENTS
REFERENCES
P. Kiss, A generalization of a problem in number theory, Math. Sem. Notes Kobe Univ., 5 (1977), no. 3, 313-317. MR 0472667 (57 #12362).
LINKS
P. Kiss, A generalization of a problem in number theory, [Hungarian], Mat. Lapok, 25 (No. 1-2, 1974), 145-149.
H. J. J. te Riele, Iteration of number-theoretic functions, Nieuw Archief v. Wiskunde, (4) 1 (1983), 345-360. See Example I.1.d.
MATHEMATICA
a[n_]:=Total[Binomial[10, #]*#!&/@IntegerDigits[n]]; NestWhileList[a, 2, UnsameQ, All] (* Ray Chandler, Nov 30 2023 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Mar 18 2019
STATUS
approved