38237

Properties

Appears in sequences

• Number of 2-factors in W_4 X P_n.at n=5A003764
• Primes p such that the period of the decimal expansion of 1/p is a square.at n=38A072858
• Primes p such that the p-1 digits of the binary expansion of k/p (for k=1,2,3,...,p-1) fit into the k-th row of a magic square grid of order p-1.at n=14A096339
• a(n) = number of finite sequences using numbers drawn from (1,2,3,...,n), using each number at most once, where each number in a finite sequence is not coprime to the previous number, and each finite sequence must continued if possible. (See example.)at n=13A175303
• a(1)=1, then a(n) = smallest number whose square is larger than 2*(a(n-1))^2.at n=28A175539
• Lesser twin prime p such that p^2-p-2 is the average of a larger twin prime pair.at n=36A231652
• Primes which are the arithmetic mean of the squares of six consecutive primes.at n=2A234432
• Number of nX3 arrays containing 3 copies of 0..n-1 with every element equal to or 1 greater than any west or northeast neighbors modulo n and the upper left element equal to 0.at n=14A267737
• a(n) is the smallest lesser twin prime p from A001359 such that the distance to the previous lesser twin prime is 6*n.at n=40A340573
• Primes p such that 14*p + 1 divides 2^p - 1.at n=31A350702
• Number of Catalan words of length n avoiding the pattern 00000.at n=11A356698
• Primes which satisfy the requirements of A380943 in more than one way.at n=17A383810
• Primes which satisfy the requirements of A380943 in exactly two ways.at n=16A383811
• Primes that are the sum of some first primes minus one.at n=13A388261
• Prime numbersat n=4036