



1, 4, 1, 6, 0, 1, 12, 4, 0, 1, 10, 0, 0, 0, 1, 24, 6, 4, 0, 0, 14, 0, 0, 0, 0, 0, 1, 27, 0, 6, 0, 0, 0, 0, 0, 1, 40, 10, 0, 0, 4, 0, 0, 0, 0, 1
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OFFSET

0,2


COMMENTS

Row sums = A060640: (1, 5, 7, 17, 11, 35, 15, 49...) Left column = A038040, d(n)*n: (1, 4, 6, 12, 10, 24, 14, 32, 27, 40...). A127168 * A008683 = A018804, (1, 3, 5, 8, 9, 15...); where A008683 = the Mobius sequence.


LINKS

Table of n, a(n) for n=0..45.


FORMULA

Square of A126988


EXAMPLE

First few rows of the triangle are:
1;
4, 1;
6, 0, 1;
12, 4, 0, 1
10, 0, 0, 0, 1
24, 6, 4, 0, 0, 1
14, 0, 0, 0, 0, 0, 1;
32, 12, 0, 4, 0, 0, 0, 1;
...


CROSSREFS

Cf. A060640, A038040, A127169, A018804, A008683.
Sequence in context: A210491 A127140 A010642 * A176216 A109039 A257656
Adjacent sequences: A127165 A127166 A127167 * A127169 A127170 A127171


KEYWORD

nonn,tabl


AUTHOR

Gary W. Adamson, Jan 06 2007


STATUS

approved



