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, 8144, 16336, 32720, 65488, 131024, 262096, 524240, 1048528, 2097104, 4194256, 8388560, 16777168, 33554384, 67108816, 134217680, 268435408, 536870864, 1073741776, 2147483600, 4294967248, 8589934544, 17179869136, 34359738320

Offset

1,1

Links

Table of n, a(n) for n=1..30.

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]

Crossrefs

Cf. A159741, A159742, A159744.

Sequence in context: A068085 A135945 A158493 * A219593 A195961 A359024

Adjacent sequences: A159740 A159741 A159742 * A159744 A159745 A159746

Keyword

nonn

Author

Al Hakanson (hawkuu(AT)gmail.com), Apr 20 2009

Extensions

More terms from Pontus von Brömssen, Jan 23 2026

Status

approved