236681

Properties

Appears in sequences

• Primes of the form p^2 - p - 1, where p is prime.at n=32A091568
• Pell equation solutions (11*a(n))^2 - 122*b(n)^2 = -1 with b(n):=A097767(n), n >= 0.at n=2A097766
• Numbers n of the form p^2-p-1 = A165900(p), for prime p, such that n^2-n-1 = A165900(n) is also prime.at n=19A237527
• Primes p of the form n^2-n-1 (for prime n) such that p^2-p-1 is also prime.at n=1A237641
• Primes of the form n^2-n-1 (for some n) such that p^2-p-1 is also prime.at n=36A237642
• Number of n X 3 binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing.at n=26A266930
• Primes p such that Euler(p, 1) is an integer multiple of Bernoulli(p + 1, 1).at n=34A341759
• Prime numbersat n=20955