A159743 If 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.
21, 81, 208, 464, 976, 2000, 4048
Offset: 1
Formula
Interpolate a(n)=2*n+60 offset 0 & b(n)=-2*n+67 offset 0. Add 21 as a leader. Binomially transform. [From Al Hakanson (hawkuu(AT)gmail.com), Jun 08 2009]