56891

Properties

Appears in sequences

• Primes of the form k^2 + k + 9.at n=26A027758
• Ado [Simone Caramel]'s function: a(0) = 1, a(n) = a(n-1) + 2*(Fibonacci(n+1)-n), n > 0.at n=20A064551
• Numbers k such that k concatenated with k-1 gives the product of two numbers which differ by 7.at n=5A116152
• Numbers k such that k concatenated with k+5 gives the product of two numbers which differ by 5.at n=4A116193
• a(0)=2, a(1)=3, a(2)=5, a(n) = smallest prime greater than or equal to a(n-1) + a(n-2) + a(n-3).at n=17A155954
• Primes p such that p + 2, p + 6, and the concatenation p (p+2) (p+6) is prime.at n=15A174858
• Initial primes in prime triples (p, p+2, p+6) preceding the maximal gaps in A201598.at n=14A201599
• Primes p such that 2*prime(p) + 1 = prime(q) for some prime q.at n=49A261361
• Number of Motzkin excursions of length n with an even number of peaks.at n=14A307576
• Expansion of Product_{k>=1} (1 + x^k) * (1 + x^(2*k)) * (1 + x^(3*k)) * (1 + x^(4*k)).at n=38A327046
• Prime numbersat n=5767