165699

Appears in sequences

• a(n) = n*(n+1)^2*(n+2)^2/12.at n=17A004282
• a(n) = floor(n/2) * floor((n-1)/2) * floor((n-2)/2) * floor((n-3)/2) * floor((n-4)/2) / 12.at n=39A028725
• a(n) is the number of subsets of {1..n} that contain exactly 2 odd and 3 even numbers.at n=38A330300