16776640domain: NAppears in sequencesa(n) = 2^n - n^2.at n=24A024012If an array is made of columns of -nacci sequences, fibo-, tribo- etc. all starting w. 1,1,2 etc, the NW to SE diagonals can be extended by computation. The above is diagonal 10. See A159741 for details.at n=15A159747