64189

Properties

Appears in sequences

• Primes p such that there exist primes p'<p"<p"'<p""<p such that the concatenation of any two among the {p,...,p""} is prime.at n=17A139005
• Number of nX4 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 2 or 4 1s.at n=4A295527
• Number of nX5 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 2 or 4 1s.at n=3A295528
• T(n,k)=Number of nXk 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 2 or 4 1s.at n=31A295531
• T(n,k)=Number of nXk 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 2 or 4 1s.at n=32A295531
• Primes containing nonprime digits (from 1 to 9) in their decimal expansion and whose digits are distinct, i.e., consisting of only digits 1, 4, 6, 8, 9.at n=27A323391
• Expansion of Sum_{k>=0} x^k / (1 - (k*x)^3)^(k+1).at n=10A360788
• Prime numbersat n=6430