A175427 Starting values which reach a single-digit number after a finite number of iterations of the map x->A175429(x).

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

Offset

1,3

Comments

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

Complement of A175426.

Links

Table of n, a(n) for n=1..47.

Example

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.

Crossrefs

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

Sequence in context: A193989 A321293 A246091 * A246098 A050608 A260424

Adjacent sequences: A175424 A175425 A175426 * A175428 A175429 A175430

Keyword

nonn,base,more

Author

Jaroslav Krizek, May 09 2010

Status

approved