118818

Appears in sequences

• Numbers k such that k and k^2 use only the digits 1, 2, 4, 7 and 8.at n=36A136997
• Triangle T(n, k, m) = round( t(n,m)/(t(k,m)*t(n-k,m)) ), with T(0, k, m) = 1, where t(n, k) = Product_{j=1..n} A129862(k+1, j), t(n, 0) = n!, and m = 4, read by rows.at n=38A156610
• Triangle T(n, k, m) = round( t(n,m)/(t(k,m)*t(n-k,m)) ), with T(0, k, m) = 1, where t(n, k) = Product_{j=1..n} A129862(k+1, j), t(n, 0) = n!, and m = 4, read by rows.at n=42A156610
• List of words over {1,8} with equal numbers of 1's and 8's.at n=10A214531