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A143969 Eigentriangle by rows, n terms of (5 * A084057) followed by A084057(n). 1
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 (list; table; graph; refs; listen; history; text; internal format)
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

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Last modified October 19 16:17 EDT 2019. Contains 328223 sequences. (Running on oeis4.)