1,2

It may be that positive integers can be written as n = m^k - k (with m and k > 1) in at most one way [checked up to 10000] as well as with k = 1 and m = n+1.

Table of n, a(n) for n=1..105.

a(5)=3 since 5 = 2^3 - 3.

Cf. A057897, A057899.

Sequence in context: A240850 A194086 A164659 * A094293 A036036 A228531

Adjacent sequences: A057895 A057896 A057897 * A057899 A057900 A057901

nonn

Henry Bottomley, Sep 26 2000

approved