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A127168 Triangle, square of A126988, row sums = A060640. 1
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 (list; table; graph; refs; listen; history; text; internal format)
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

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Last modified May 13 11:50 EDT 2021. Contains 343839 sequences. (Running on oeis4.)