131024domain: NAppears in sequencesa(n) = 2^(n+1) - 3*n.at n=15A123203If 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 7. See A159741 for details.at n=11A159743Fibonacci 13-step numbers.at n=30A168084