602447domain: NAppears in sequencesn-th term of the Fibonacci-type sequence x(1)=1, x(2)=Fibonacci(n), x(k+1)=x(k)+x(k-1) for k>1.at n=15A142975Number of nX5 0..1 arrays with every element equal to 2 or 3 king-move adjacent elements, with upper left element zero.at n=19A297811