645278domain: NAppears in sequencesA000016 / 2.at n=23A054539Number of subsets of {1,2,3,...,n} that sum to 0 mod 13.at n=23A068034Number of (n+3)X(1+3) 0..1 arrays with each row and column divisible by 13, read as a binary number with top and left being the most significant bits.at n=19A262482