A246493 Smallest k such that 5^^n is not congruent to 5^^(n-1) mod k, where 5^^n denotes the power tower 5^5^...^5 (in which 5 appears n times).

3, 7, 19, 47, 243, 719, 1439, 2879, 19683, 59049, 177147, 531441, 1594323, 4782969

Offset

1,1

Comments

For general remarks regarding sequences of this type, see A246491.

Links

Table of n, a(n) for n=1..14.

Prog

(Sage, cython) Use linked source from A246491 with this command: find_k_values(5, 1, 1)

Crossrefs

Cf. A027763, A246491, A246492, A246494, A246495, A246496, A246497

Sequence in context: A308153 A049117 A146810 * A293733 A073063 A370169

Adjacent sequences: A246490 A246491 A246492 * A246494 A246495 A246496

Keyword

nonn,more

Author

Wayne VanWeerthuizen, Aug 27 2014

Status

approved