42032

Appears in sequences

• sigma(n) + phi(n) is a fourth power.at n=12A114068
• Difference between the sum of odd parts and the sum of even parts in all the partitions of n.at n=36A208477
• Product of n and the sum of all divisors of all positive integers <= n.at n=36A256533
• Number of length-n 0..3 arrays with no adjacent pair x,x+1 followed at any distance by x+1,x.at n=7A268452
• T(n,k)=Number of length-n 0..k arrays with no adjacent pair x,x+1 followed at any distance by x+1,x.at n=52A268457
• Expansion of Product_{k>=1} (1 - x^(6*k)) * (1 + x^k) / (1 - x^k).at n=27A280874
• Let p = n-th prime == 7 mod 8; a(n) = sum of quadratic residues mod p that are > p/2.at n=25A282040
• Numbers k such that (35*10^k - 737)/9 is prime.at n=19A295397
• Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 5 or 7 king-move adjacent elements, with upper left element zero.at n=7A304930
• Number of ways to tile a hexagonal strip made up of n equilateral triangles, using singles and triples.at n=23A365352