3187188domain: NAppears in sequencesSum of 2nd, 4th, 6th, 8th and 10th powers of divisors are divisible by sum of divisors.at n=31A074471Number of (n+1) X (2+1) 0..1 arrays with each row divisible by 3 and column not divisible by 3, read as a binary number with top and left being the most significant bits.at n=13A262414