A143969 Eigentriangle by rows, n terms of (5 * A084057) followed by A084057(n).

1, 5, 1, 5, 5, 6, 5, 5, 30, 16, 5, 5, 30, 80, 56, 5, 5, 30, 80, 280, 176, 5, 5, 30, 80, 280, 880, 1856, 5, 5, 30, 80, 280, 880, 9280, 6016, 5, 5, 30, 80, 280, 880, 9280, 30080, 19456

Offset

0,2

Comments

Right border = A084057: (1, 1, 6, 16, 56, 176,...). Row sums = (1, 6, 16, 56,...) = INVERT transform of (1, 5, 5, 5,...). Sum of n-th row terms = rightmost term of next row.

Links

Table of n, a(n) for n=0..44.

Formula

Eigentriangle by rows, n terms of (5 * A084057) followed by A084057(n).

Example

First few rows of the triangle =
1;
5, 1;
5, 5, 6;
5, 5, 30, 16;
5, 5, 30, 80, 56;
5, 5, 30, 80, 280, 176;
5, 5, 30, 80, 280, 880, 1856;
...

Crossrefs

A084057

Sequence in context: A021198 A275976 A306577 * A198366 A162797 A087232

Adjacent sequences: A143966 A143967 A143968 * A143970 A143971 A143972

Keyword

nonn,tabl

Author

Gary W. Adamson, Sep 06 2008

Status

approved