8957108167domain: NAppears in sequencesNumber of independent vertex sets in the n-prism graph Y_n = K_2 X C_n (n > 2).at n=26A051927a(n) = 6*a(n-1) - a(n-2) - 4, a(0)=3, a(1)=7.at n=13A081555Number of base-3 circular n-digit numbers with adjacent digits differing by 1 or less.at n=26A124696