



1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0
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OFFSET

1,1


COMMENTS

Row sums = A023900: (1, 1, 2, 0, 4, 2, 6,...) Left border = mu(n), A008683.


LINKS

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


FORMULA

A128407 * A054521 as infinite lower triangular matrices.


EXAMPLE

First few rows of the triangle are:
1;
1, 0;
1, 1, 0;
0, 0, 0, 0;
1, 1, 1, 1, 0;
1, 0, 0, 0, 1, 0;
1, 1, 1, 1, 1, 1, 0;
0, 0, 0, 0, 0, 0, 0, 0;
...


CROSSREFS

Cf. A128407, A054521, A008683, A023900.
Sequence in context: A098457 A137161 A077050 * A195198 A039966 A089451
Adjacent sequences: A128429 A128430 A128431 * A128433 A128434 A128435


KEYWORD

tabl,sign


AUTHOR

Gary W. Adamson, Mar 03 2007


STATUS

approved



