72823

Properties

Appears in sequences

• Primes p such that q-p = 36, where q is the next prime after p.at n=32A134117
• Position of Fibonacci numbers in the EKG sequence.at n=24A140469
• Number of n X n binary arrays with all ones connected only in a 1100-1111-0001 pattern in any orientation.at n=7A146847
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111-0001 pattern in any orientation.at n=16A146849
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111-0001 pattern in any orientation.at n=17A146849
• Primes of the form 7n^2 - 5.at n=19A201851
• Primes p such that 2*p^2 + 3 and 2*p^2 + 5 are also primes.at n=42A247197
• a(1) = 1; a(2) = 1; for n >= 3, a(n) = a(n-1) / gcd(a(n-1), n-1) + a(n-2) / gcd(a(n-2), n-2).at n=45A330806
• First member of the least set of 3 consecutive primes such that the sum of each pair of consecutive primes in this set is a multiple of n.at n=22A382698
• Prime numbersat n=7200