219936domain: NAppears in sequencesa(n) = Sum_{k=0..floor(n/2)} binomial(2*n-2*k,2*k)*2^(n-k).at n=9A108485Number of strings of numbers x(i=1..n) in 0..2 with sum i*x(i)^3 equal to n*8.at n=19A184713Number of ways to tile a 3 X n board with 2 X 2 and 3 X 3 staircase tiles.at n=18A374512