10001880

Appears in sequences

• Smallest nontrivial (not = 10^(n-1)) n-digit 7-smooth number. Or smallest n-digit number > 10^(n-1) with prime divisors < 10.at n=7A085867
• Array read by antidiagonals: T(n,k) is the number of rooted (2k)-regular planar maps with n vertices, n >= 0, k >= 0.at n=39A380241
• Number of rooted 2n-regular planar maps with 3 vertices.at n=4A380243