50423

Properties

Appears in sequences

• Indices of primes at which the prime race 4k-1 vs. 4k+1 is tied.at n=18A038691
• Primes p such that p, p+18, p+36 are consecutive primes.at n=6A052189
• Number of 3 X n 0..2 arrays with diagonals and antidiagonals unimodal and rows nondecreasing.at n=7A224354
• Indices k such that s_k(4) is a (probable) prime, where s_k(4) = 4*s_{k-1}(4) - s_{k-2}(4), k >= 2, s_0(4) = 1, s_1(4) = 5.at n=20A299100
• a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/3)} binomial(n-1,3*k) * a(k).at n=18A352045
• Prime numbers that precede and follow consecutive balanced primes.at n=4A374507
• Prime numbersat n=5175