27041560

Appears in sequences

• a(n) = 6*(2*n+1)! / ((n!)^2*(n+3)).at n=12A007946
• Number of ways to select 15 knights from n knights sitting at a round table if no adjacent knights are chosen.at n=12A188225
• a(n) = 6*(n+1)!/((3+floor(n/2))*(floor(n/2)!)^2).at n=24A242986
• 12-dimensional square numbers.at n=15A266561