177025domain: NAppears in sequencesNumber of base 5 circular n-digit numbers with adjacent digits differing by 1 or less.at n=12A124698a(n) = (1+sqrt(3))^n + (-2)^n + (1-sqrt(3))^n + 1.at n=12A215502Pseudoprimes to base 7 that are not squarefree.at n=12A243089