A175427 - OEIS

%I #11 Jan 20 2022 18:16:34

%S 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,27,

%T 28,29,30,31,32,33,34,37,38,39,40,41,42,43,44,45,46,47,48,49,50

%N Starting values which reach a single-digit number after a finite number of iterations of the map x->A175429(x).

%C Arguments m such that A175424(m) >= 0. Also arguments m such that A175419(m) >= 0.

%C Complement of A175426.

%e 27 is in the sequence because a single-digit number is reached in 3 iterations: 7^2 = 49, 9^4 = 6561, ((1^6)^5)^6 = 1, so A175424(27) = 3.

%Y Cf. A175419, A175420, A175421, A175422, A175423, A175424, A175425, A175426.

%K nonn,base,more

%O 1,3

%A _Jaroslav Krizek_, May 09 2010