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A261697
Irregular triangle read by rows in which row n lists the odd divisors of n in the ordering given by A261699.
4
1, 1, 1, 3, 1, 1, 5, 1, 3, 1, 7, 1, 1, 9, 3, 1, 5, 1, 11, 1, 3, 1, 13, 1, 7, 1, 15, 3, 5, 1, 1, 17, 1, 3, 9, 1, 19, 1, 5, 1, 21, 3, 7, 1, 11, 1, 23, 1, 3, 1, 25, 5, 1, 13, 1, 27, 3, 9, 1, 7, 1, 29, 1, 3, 15, 5, 1, 31, 1, 1, 33, 3, 11, 1, 17, 1, 35, 5, 7, 1, 3, 9, 1, 37, 1, 19, 1, 39, 3, 13, 1, 5, 1, 41, 1, 3, 21, 7, 1, 43, 1, 11, 1, 45, 3, 5, 15, 9
OFFSET
1,4
COMMENTS
Positive terms of A261699.
Note that this ordering is unusual.
Row lengths give A001227.
Row sums give A000593.
Another version of A182469 from which differs at a(14), or T(9,2).
For a similar version see A261698 from which differs at a(34), or T(18,2).
EXAMPLE
List of divisors of 45 from distinct sequences:
45th row of triangle A182469: 1, 3, 5, 9, 15, 45.
45th row of triangle A261698: 1, 45, 3, 15, 5, 9.
45th row of this triangle...: 1, 45, 3, 5, 15, 9.
Triangle begins:
1;
1;
1, 3;
1;
1, 5;
1, 3;
1, 7;
1;
1, 9, 3;
1, 5;
1, 11;
1, 3;
1, 13;
1, 7;
1, 15, 3, 5;
1;
1, 17;
1, 3, 9;
1, 19;
1, 5;
1, 21, 3, 7;
...
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Omar E. Pol, Sep 21 2015
STATUS
approved