|
Search: id:A127528
|
|
|
| A127528 |
|
Triangle, left column = d(n)*phi(n), right border = d(n), row sums = n*d(n). |
|
+0
2
|
|
| 1, 2, 2, 4, 0, 2, 6, 3, 0, 3, 8, 0, 0, 0, 2, 8, 8, 4, 0, 0, 4, 12, 0, 0, 0, 0, 0, 2, 16
(list; table; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
Left column = d(n)*phi(n), A062355; right border = d(n), row sums = n*d(n), A038040: (1, 4, 6, 12, 10, 24,...). A127527 = A054523 * M
|
|
FORMULA
|
M * A054523 as infinite lower triangular matrices; M = d(n), A000005: (1, 2, 2, 3, 2, 4, 2, 4,...) in the main diagonal and the rest zeros.
|
|
EXAMPLE
|
First few rows of the triangle are:
1;
2, 2;
4, 0, 2;
6, 3, 0, 3;
8, 0, 0, 0, 2;
8, 8, 4, 0, 0, 4;
12, 0, 0, 0, 0, 0, 2;
...
|
|
CROSSREFS
|
Cf. A054523, A127527, A062355, A038040, A000005.
Sequence in context: A094877 A006560 A088251 this_sequence A063070 A049802 A129240
Adjacent sequences: A127525 A127526 A127527 this_sequence A127529 A127530 A127531
|
|
KEYWORD
|
nonn,tabl,uned
|
|
AUTHOR
|
Gary W. Adamson (qntmpkt(AT)yahoo.com), Jan 17 2007
|
|
|
Search completed in 0.002 seconds
|
