A156241 - OEIS

A156241

Triangle read by rows, T(n,k). If k divides n then A008683(n)*A008683(k).

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

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OFFSET

1,1

COMMENTS

A008683 is found in the first column. A087003 appears in the second column.

The definition does not match the values for n=k. Apparently T(n,n) has been set to 1, not mu(n)*mu(n). [From R. J. Mathar, Mar 14 2009]

LINKS

Table of n, a(n) for n=1..100.

CROSSREFS

Sequence in context: A183918 A128408 A121802 * A156254 A010056 A283437

Adjacent sequences: A156238 A156239 A156240 * A156242 A156243 A156244

KEYWORD

sign,tabl

AUTHOR

Mats Granvik, Feb 07 2009

STATUS

approved