1003942

Appears in sequences

• a(n) = Sum_{k=1..n-1} gcd(k,n)*a(k), a(1) = 1.at n=18A072979
• a(n) = a(n-1) + a(n-3) + a(n-5) - a(n-6), a(0) = a(1) = a(2) = 1, a(3) = 2, a(4) = 3, a(5) = 5.at n=35A278706