4384979

Properties

Appears in sequences

• Prime Riesel numbers: primes p such that p*2^k - 1 is composite for all positive integers k.at n=10A182296
• Number of (n+1)X(3+1) 0..2 arrays with the maximum plus the lower median of every 2X2 subblock equal.at n=3A237476
• Number of (n+1)X(4+1) 0..2 arrays with the maximum plus the lower median of every 2X2 subblock equal.at n=2A237477
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum plus the lower median of every 2X2 subblock equal.at n=17A237481
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum plus the lower median of every 2X2 subblock equal.at n=18A237481
• Odd integers n such that for every integer k>0, n*2^k-1 has a divisor in the set {3, 5, 7, 13, 17, 241}.at n=20A244070
• Odd numbers n not congruent to 1 mod 6 and that are not perfect powers such that for all k >= 1 the numbers n*4^k - 1 are composite.at n=26A251757
• Prime numbersat n=308378