55949

Properties

Appears in sequences

• a(n) is the number of decompositions of H(n,1) into disjoint unions of H(j,k) where H(j,k) is the set of numbers { (2*i-1)*(2*k-1), 1 <= i <= j }.at n=39A336739
• Primes having only {4, 5, 9} as digits.at n=25A385793
• Prime numbersat n=5680