69431

Properties

Appears in sequences

• Primes of the form p^2 + p - 1 when p is prime.at n=23A053185
• Second prime factor, if it exists, of Mersenne numbers.at n=7A089158
• Triangle read by rows formed by the prime factors of Mersenne number 2^prime(n) - 1, n >= 1.at n=26A089162
• Number of nX4 binary arrays with each sum of a(1..i,1..j) no greater than i*j/2 and rows and columns in nondecreasing order.at n=7A183411
• T(n,k)=Number of nXk binary arrays with each sum of a(1..i,1..j) no greater than i*j/2 and rows and columns in nondecreasing order.at n=58A183413
• Number of partitions p of n such that 3*min(p) is a part of p.at n=46A238590
• Prime factors of 2^A054723(n)-1, ordered by increasing n, then by increasing size of the factors.at n=18A244453
• Primes of the form n^2 + phi(n).at n=37A264771
• Prime numbersat n=6892