1192462domain: NAppears in sequencesEven semiprimes of the form prime(n)*prime(n+1) - 1.at n=14A103533Semiprimes which are the product of a twin prime pair minus one.at n=13A269663Number of nX5 0..1 arrays with every element unequal to 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.at n=13A303633