a(n) > a(n-1) is the smallest number such that a(n)! contains a(n-1)! as a substring, with a(0) = 0.

A306155

a(n) > a(n-1) is the smallest number such that a(n)! contains a(n-1)! as a substring, with a(0) = 0.

Terms

    a(0) =0a(1) =1a(2) =5a(3) =14a(4) =179472

External references