45663domain: NAppears in sequencesNumber of base 9 circular n-digit numbers with adjacent digits differing by 3 or less.at n=6A125319Number of nX1 binary arrays with the number of 0-1 adjacencies equal to the number of 0-0 adjacencies.at n=19A183256Numbers k such that 3^k - 26 is prime.at n=19A219045