116290domain: NAppears in sequencesNumber of strings of numbers x(i=1..n) in 0..2 with sum i^2*x(i) equal to n^2*2.at n=23A183946Numbers n such that 4n+1, 4n+3, 4n+7, 4n+9 and 4n+13 are prime.at n=14A254376