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A128431 Triangle read by rows: A054521 * A128407. 0
1, 1, 0, 1, -1, 0, 1, 0, -1, 0, 1, -1, -1, 0, 0, 1, 0, 0, 0, -1, 0, 1, -1, -1, 0, -1, 1, 0, 1, 0, -1, 0, -1, 0, -1, 0, 1, -1, 0, 0, -1, 0, -1, 0, 0, 1, 0, -1, 0, 0, 0, -1, 0, 0, 0 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row sums = A112399: (1, 1, 0, 0, -1, 0, -1, -2, -2, -1,...)

LINKS

Table of n, a(n) for n=1..55.

FORMULA

A054521 * A128407 as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1;

1, 0;

1, -1, 0;

1, 0, -1, 0;

1, -1, -1, 0, 0;

1, 0, 0, 0, -1, 0;

1, -1, -1, 0, -1, 1, 0;

CROSSREFS

Cf. A054521, A128407, A112399, A008683.

Sequence in context: A143242 A136442 A168030 * A054521 A014240 A014471

Adjacent sequences:  A128428 A128429 A128430 * A128432 A128433 A128434

KEYWORD

tabl,sign

AUTHOR

Gary W. Adamson, Mar 03 2007

STATUS

approved

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Last modified November 23 16:08 EST 2014. Contains 249851 sequences.