45077

Properties

Appears in sequences

• a(n) is the number of numbers k with 2^(n-1) < k <= 2^n having a number of divisors that is a power of 2.at n=16A036539
• Negative of column k=3 sequence of array A103728.at n=16A103730
• Number of nondecreasing strings of numbers x(i=1..7) in -n..n with sum x(i)^3 equal to 0.at n=35A188281
• Primes having only {0, 4, 5, 7} as digits.at n=31A386070
• Primes k such that the concatenation of (b, k, b) and (k, b, k) are both prime, where b is the binary representation of k.at n=17A389801
• Prime numbersat n=4680