1391390

Appears in sequences

• Largest number which requires n iterations of the bi-unitary totient function (A116550) to reach 1.at n=35A225175
• Irregular triangle read by rows: T(n,k) is the number of n-permutations whose fourth-longest cycle has length exactly k; n >= 0, 0 <= k <= floor(n/4).at n=23A350273