The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A129360 A054525 * A115361. 12

%I #15 Aug 04 2018 14:27:54

%S 1,0,1,-1,0,1,0,0,0,1,-1,0,0,0,1,0,-1,0,0,0,1,-1,0,0,0,0,0,1,0,0,0,0,

%T 0,0,0,1,0,0,-1,0,0,0,0,0,1,0,-1,0,0,0,0,0,0,0,1,-1,0,0,0,0,0,0,0,0,0,

%U 1,0,0,0,-1,0,0,0,0,0,0,0,1,-1,0,0,0,0,0,0,0,0,0,0,0,1

%N A054525 * A115361.

%C Row sums = A209229 (1, 1, 0, 1, 0, 0, 0, 1, ...).

%C A129353 = the inverse Möbius transform of A115361.

%H Andrew Howroyd, <a href="/A129360/b129360.txt">Table of n, a(n) for n = 1..1275</a>

%F Moebius transform of A115361.

%F T(n,k) = A087003(n/k) for k | n, T(n,k) = 0 otherwise. - _Andrew Howroyd_, Aug 03 2018

%e First few rows of the triangle are:

%e 1;

%e 0, 1;

%e -1, 0, 1;

%e 0, 0, 0, 1;

%e -1, 0, 0, 0, 1;

%e 0, -1, 0, 0, 0, 1;

%e -1, 0, 0, 0, 0, 0, 1;

%e 0, 0, 0, 0, 0, 0, 0, 1;

%e ...

%o (PARI) tabl(nn) = {Tm = matrix(nn, nn, n, k, if (! (n % k), moebius(n/k), 0)); Tr = matrix(nn, nn, n, k, n--; k--; if ((n==k), 1, if (n==2*k+1, -1, 0))); Ti = Tr^(-1); Tp = Tm*Ti; for (n=1, nn, for (k=1, n, print1(Tp[n, k], ", ");); print(););} \\ _Michel Marcus_, Mar 28 2015

%o (PARI) T(n, k)={ if(n%k, 0, sumdiv(n/k, d, my(e=valuation(d, 2)); if(d==1<<e, moebius(n/(k*d)), 0))) } \\ _Andrew Howroyd_, Aug 03 2018

%Y Column 1 is A087003 (Moebius transform of A209229).

%Y Row sums are A209229.

%Y Cf. A054525, A115361, A129353, A001511, A103994, A129501.

%K tabl,sign

%O 1,1

%A _Gary W. Adamson_, Apr 10 2007

%E More terms from _Michel Marcus_, Mar 28 2015

%E Offset changed by _Andrew Howroyd_, Aug 03 2018

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 2 12:34 EDT 2024. Contains 373040 sequences. (Running on oeis4.)