1458000

Appears in sequences

• Product of numbers <= n that have a prime factor in common with n.at n=14A066570
• Number of ways to place k non-attacking semi-knights on an n x n chessboard, sum over all k>=0.at n=4A182562
• T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having index change +-(.,.) 0,0 or 1,2.at n=49A263989
• a(n) is the product of the first n positive evil numbers.at n=7A336743