4581298450domain: NAppears in sequencesNumber of (n+3) X (1+3) 0..1 arrays with each row and column divisible by 15, read as a binary number with top and left being the most significant bits.at n=32A262450Number of distinct quartic residues x^4 (mod 4^n), x=0..4^n-1.at n=18A365103