A133904 a(n)= gcd(a(n-1),n)*a(n-1) + d(n) if a(n-1) is not divisible by 2 else a(n)= a(n-1)/2, where gcd denotes common divisor, d(n) is number of divisors of n.

1, 2, 1, 3, 6, 3, 13, 15, 19, 22, 11, 123, 375, 377, 381, 1147, 1152, 576, 288, 144, 72, 36, 18, 9, 17, 20, 10, 5, 11, 13, 21, 23, 29, 33, 37, 41, 50, 25, 29, 33, 41, 1683, 5055, 5057, 5063, 5069, 5073, 5075, 5085, 5088, 2544, 1272, 636, 368, 184, 92, 46, 23