login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A127510 Triangle T(n,k) = k*mobius(n). 2
1, -1, -2, -1, -2, -3, 0, 0, 0, 0, -1, -2, -3, -4, -5, 1, 2, 3, 4, 5, 6, -1, -2, -3, -4, -5, -6, -7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

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

FORMULA

T(n,k) = A008683(n)*k.

EXAMPLE

First few rows of the triangle are:

1;

-1, -2;

-1, -2, -3;

0, 0, 0, 0;

-1, -2, -3, -4, -5;

1, 2, 3, 4, 5, 6;

...

MAPLE

A127510 := proc(n, k)

    numtheory[mobius](n)*k ;

end proc: # R. J. Mathar, Sep 08 2013

CROSSREFS

Cf. A008683, A000217, A125287 (row sums).

Sequence in context: A092186 A138262 A276990 * A328362 A158810 A129391

Adjacent sequences:  A127507 A127508 A127509 * A127511 A127512 A127513

KEYWORD

tabl,easy,sign

AUTHOR

Gary W. Adamson, Jan 17 2007

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 19 09:57 EST 2020. Contains 332041 sequences. (Running on oeis4.)