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!)
A117170 Triangle of coefficients for the Inverse Shift-Moebius transform, read by rows. 7
1, 1, 1, 2, 0, 1, 2, 1, 0, 1, 3, 1, 0, 0, 1, 3, 2, 1, 0, 0, 1, 4, 1, 1, 0, 0, 0, 1, 3, 3, 1, 1, 0, 0, 0, 1, 6, 1, 2, 1, 0, 0, 0, 0, 1, 5, 4, 1, 1, 1, 0, 0, 0, 0, 1, 5, 2, 2, 1, 1, 0, 0, 0, 0, 0, 1, 6, 4, 2, 2, 1, 1, 0, 0, 0, 0, 0, 1, 7, 2, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 7, 6, 2, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,4
COMMENTS
Column k = Inverse-Shift-Moebius transform of all zeros except for a single '1' in position k: [0,0,0,..(k-1)zeros..,1,0,0,0,...].
Column 1 is A117171 and equals Inverse-Shift-Moebius([1,0,0,0,...]).
Column 2 is A117172 and equals Inverse-Shift-Moebius([0,1,0,0,...]).
Column 3 is A117173 and equals Inverse-Shift-Moebius([0,0,1,0,...]).
Row sums give A117174 and equals Inverse-Shift-Moebius([1,1,1,...]).
LINKS
EXAMPLE
Triangle begins:
1;
1, 1;
2, 0, 1;
2, 1, 0, 1;
3, 1, 0, 0, 1;
3, 2, 1, 0, 0, 1;
4, 1, 1, 0, 0, 0, 1;
3, 3, 1, 1, 0, 0, 0, 1;
6, 1, 2, 1, 0, 0, 0, 0, 1;
5, 4, 1, 1, 1, 0, 0, 0, 0, 1;
5, 2, 2, 1, 1, 0, 0, 0, 0, 0, 1;
6, 4, 2, 2, 1, 1, 0, 0, 0, 0, 0, 1;
7, 2, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1;
7, 6, 2, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1;
10, 3, 4, 1, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1;
7, 6, 2, 3, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1; ...
PROG
(PARI) {T(n, k)=if(n<k, 0, prod(i=0, n, matrix(n, n, r, c, if(r>=c, if((r+i)%(c+i)==0, 1, 0))))[n, k])}
CROSSREFS
Cf. A117171 (column 1), A117172 (column 2), A117173 (column 3), A117174 (row sums), A117165 (inverse), A117162, A008683; A117176.
Sequence in context: A158948 A140224 A075993 * A117466 A136266 A292047
KEYWORD
nonn,tabl
AUTHOR
STATUS
approved

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 March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)