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A143276 Triangle read by rows, A054525 * A054523, 1<=k<=n. 1
1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 3, 0, 0, 0, 1, 0, 5, 10, 0, 0, 1, 5, 0, 0, 0, 0, 0, 1, 2, 1, 0, 0, 0, 0, 0, 1, 4, 0, 1, 0, 0, 0, 0, 0, 1, 0, 3, 0, 0, 0, 0, 0, 0, 0, 1, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,11

COMMENTS

Row sums = phi(n), A000010: (1, 1, 2, 2, 4, 2, 6,...).

Left border = A007431: (1, 0, 1, 1, 3, 0, 5, 2, 4,...).

LINKS

Table of n, a(n) for n=1..105.

FORMULA

Triangle read by rows, Mobius transform of triangle A054523.

EXAMPLE

First few rows of the triangle =

1;

0, 1;

1, 0, 1;

1, 0, 0, 1;

3, 0, 0, 0, 1;

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

5, 0, 0, 0, 0, 0, 1;

2, 1, 0, 0, 0, 0, 0, 1;

...

CROSSREFS

Cf. A054525, A054523, A000010, A007431.

Sequence in context: A083206 A069531 A035677 * A283470 A101941 A089313

Adjacent sequences:  A143273 A143274 A143275 * A143277 A143278 A143279

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Aug 03 2008

STATUS

approved

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Last modified February 19 15:01 EST 2018. Contains 299334 sequences. (Running on oeis4.)