77906507591domain: NAppears in sequencesNumber of ways to place any number of black and any number of white nonattacking knights on a (n+2)X(2+2) board.at n=5A251527T(n,k)=Number of ways to place any number of black and any number of white nonattacking knights on a (n+2)X(k+2) board.at n=22A251531