185334

Appears in sequences

• Numbers n such that product of double factorials of the digits of n equals sigma(n).at n=32A158989
• a(n) = 2*a(n-1) + a(n-3) for n >= 4, with initial values a(0) = 1, a(1) = 0, a(2) = 2, and a(3) = 3.at n=17A335242