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A306961 Trajectory of 3 under repeated application of x -> A306958(x). 2
3, 720, 604891, 5599451, 7353370, 1242001, 5242, 35460, 187201, 2419311, 3634680, 2123281, 1815410, 1849711, 6053070, 786963, 6351120, 182271, 2419400, 3638982, 7410330, 611292, 3780200, 2420013, 5952, 3689370, 6200641, 307542, 640891, 5599451, 7353370, 1242001, 5242, 35460, 187201, 2419311, 3634680, 2123281, 1815410, 1849711 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

At the third step the trajectory enters a cycle of length 26: (5599451, 7353370, 1242001, 5242, 35460, 187201, 2419311, 3634680, 2123281, 1815410, 1849711, 6053070, 786963, 6351120, 182271, 2419400, 3638982, 7410330, 611292, 3780200, 2420013, 5952, 3689370, 6200641, 307542, 640891).

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

Table of n, a(n) for n=1..40.

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.

CROSSREFS

Cf. A306957, A306958, A306959, A306960, A306962.

Sequence in context: A308323 A276455 A231604 * A059120 A300947 A013826

Adjacent sequences:  A306958 A306959 A306960 * A306962 A306963 A306964

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Mar 18 2019

STATUS

approved

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Last modified January 21 05:39 EST 2020. Contains 331104 sequences. (Running on oeis4.)