350543domain: NAppears in sequencesNumber of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 and no antidiagonal sum 3 and no row sum 1 and no column sum 1.at n=25A257439Number of n-bead necklace structures using an infinite alphabet that are not self-equivalent under a nonzero rotation.at n=12A327696