168912

Appears in sequences

• a(k) = k! * lim_{n->oo} card({ i*j; i=1..k, j=1..n })/n.at n=7A126959
• a(1) = 1; a(2) = 3; for n > 2, a(n) is the smallest proper multiple of a(n-1) that contains a(n-2) as subsequence of its digits.at n=6A372880