73421

Properties

Appears in sequences

• Primes prime(k) such that the sum of the squares of digits of prime(k) equals the sum of the squares of digits of k.at n=37A193255
• Least q > 0 such that min { x >= 0 | q + prime(n)*x + x^2 is composite } is a (local) maximum, cf. A273756 & A273770.at n=16A273595
• Least p for which min { x >= 0 | p + (2n+1)*x + x^2 is composite } reaches the (local) maximum given in A273770.at n=30A273756
• Number of nX4 0..1 arrays with every element unequal to 0, 1 or 5 king-move adjacent elements, with upper left element zero.at n=14A303715
• Number of partitions of n such that 4*(greatest part) >= (number of parts).at n=43A347868
• Prime numbersat n=7251