|
| |
|
|
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.
|
|
1
| |
|
|
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; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,3
|
|
|
COMMENTS
| 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: A140756 A002260 A194905 * A066041 A194965 A194896
Adjacent sequences: A133991 A133992 A133993 * A133995 A133996 A133997
|
|
|
KEYWORD
| nonn,tabf
|
|
|
AUTHOR
| Leroy Quet Oct 01 2007
|
| |
|
|
