40037

Properties

Appears in sequences

• Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 00100-11111-00100 pattern in any orientation.at n=14A147006
• Primes that are the sum of all composite numbers in-between prime numbers p(n) and p(n+2).at n=33A174521
• Primes of the form 5*x^2 - 3*y^2, where x and y are consecutive numbers.at n=33A176470
• a(n) is the smallest prime(m) such that the interval (prime(m)*n, prime(m+1)*n) contains exactly two primes.at n=48A187809
• Number of n X 1 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it, modulo 4.at n=12A239812
• Primes of form n^2 + 2401.at n=24A256835
• Primes p such that phi(p-3) = phi(phi(p-2)-1).at n=20A271658
• Number of unordered pairs of rooted trees with a total of n nodes and an odd total of leaves.at n=14A339525
• Lesser twin primes p such that 4*p is the sum of two consecutive primes.at n=36A350736
• a(n) is the smallest k such that tau(k*2^n - 1) is equal to 2^n where tau = A000005.at n=6A377634
• Prime numbersat n=4207