112525

Appears in sequences

• n times pi(n) is made of nontrivial runs of identical digits, where pi(n)=A000720(n).at n=18A116057
• 6-digit numbers k such that: (a) the digits of k are from the set {1, 2, 3, 4, 5}, and (b) any digit that appears in k appears at least twice.at n=31A171725
• Number of (w,x,y,z) with all terms in {1,...,n} and w*x-y*z<=n.at n=21A212109