|
Search: id:A133994
|
|
|
| A133994 |
|
Irregular array read by rows: n-th row contains (in numerical order) both the divisors of n and the positive integers <= n which are coprime to n. |
|
+0
2
|
|
| 1, 1, 2, 1, 2, 3, 1, 2, 3, 4, 1, 2, 3, 4, 5, 1, 2, 3, 5, 6, 1, 2, 3, 4, 5, 6, 7, 1, 2, 3, 4, 5, 7, 8, 1, 2, 3, 4, 5, 7, 8, 9, 1, 2, 3, 5, 7, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1, 2, 3, 4, 5, 6, 7, 11, 12, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 1, 2, 3, 5, 7, 9, 11, 13, 14
(list; graph; listen)
|
|
|
OFFSET
|
1,3
|
|
|
COMMENT
|
Row n contains A073757(n) terms.
|
|
EXAMPLE
|
The divisors of 12 are: 1,2,3,4,6,12. The positive integers which are <= 12 and are coprime to 12 are: 1,5,7,11. So row 12 is the union of these two lists: 1,2,3,4,5,6,7,11,12.
|
|
CROSSREFS
|
Cf. A133995, A073757.
Sequence in context: A136261 A140756 A002260 this_sequence A066041 A119585 A066040
Adjacent sequences: A133991 A133992 A133993 this_sequence A133995 A133996 A133997
|
|
KEYWORD
|
nonn,tabf
|
|
AUTHOR
|
Leroy Quet (q1qq2qqq3qqqq(AT)yahoo.com), Oct 01 2007
|
|
|
Search completed in 0.002 seconds
|
