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 9. See A159741 for details.

A159746

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 9. See A159741 for details.

Terms

    a(0) =55a(1) =274a(2) =773a(3) =1793a(4) =3840a(5) =7936a(6) =16128a(7) =32512a(8) =65280a(9) =130816a(10) =261888a(11) =524032a(12) =1048320a(13) =2096896a(14) =4194048a(15) =8388352a(16) =16776960a(17) =33554176a(18) =67108608a(19) =134217472a(20) =268435200a(21) =536870656a(22) =1073741568a(23) =2147483392a(24) =4294967040a(25) =8589934336a(26) =17179868928a(27) =34359738112

External references