205208

Appears in sequences

• a(0) = 1; a(n) = sum_{k=1 to d(n)} [a(n-k)] where d(n) is number of positive divisors of n.at n=21A055873
• a(n) = floor(r*a(n-1)) + floor(r*a(n-2)) + floor(r*a(n-3)), where r = 3/2, a(0) = a(1) = a(2) = 1.at n=16A275873
• Number of n-step closed paths on the Cairo pentagonal lattice graph starting from a degree-4 node.at n=13A357810