3538161

Appears in sequences

• a(n) = Product_{d|n} (n/d + d).at n=17A045661
• Numbers k that divide the square of the sum of the first k primes.at n=12A111452
• Triangle T(n, k, m) = t(n,m)/( t(k,m) * t(n-k,m) ) with T(n, 0, m) = T(n, n, m) = 1, where t(n, m) = Product_{j=1..n} Product_{i=1..j-1} ( 1 - (m+1)*(2*i-1) ) and m = 3, read by rows.at n=17A156698
• Triangle T(n, k, m) = t(n,m)/( t(k,m) * t(n-k,m) ) with T(n, 0, m) = T(n, n, m) = 1, where t(n, m) = Product_{j=1..n} Product_{i=1..j-1} ( 1 - (m+1)*(2*i-1) ) and m = 3, read by rows.at n=18A156698
• Number of n X 6 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor.at n=2A221085
• T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor.at n=30A221087
• Number of 3 X n arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor.at n=5A221089