OFFSET
1,7
COMMENTS
In the data section the overlined parts cannot be represented correctly, therefore the sequence represents all possible suborderings generated by the overlined parts.
The diagram in the second part of the Example section shows only one of the possible suborderings.
The equivalent sequence for partitions is A211992.
The equivalent sequence for compositions is A228525.
See both sequences for more information.
Row n contains A015128(n) overpartitions.
Row n contains A235792(n) parts.
Row sums give A235793.
EXAMPLE
Triangle begins:
[1], [1];
[1, 1], [1, 1], [2], [2];
[1, 1, 1], [1, 1, 1], [2, 1], [2, 1], [2, 1], [2, 1], [3], [3];
[1, 1, 1, 1], [1, 1, 1, 1], [2, 1, 1], [2, 1, 1], [2, 1, 1], [2, 1, 1], [3, 1], [3, 1], [3, 1], [3, 1], [2, 2], [2, 2], [4], [4];
...
Illustration of initial terms (n: 1..4)
-----------------------------------------
n Diagram Overpartition
-----------------------------------------
. _
1 |.| 1',
1 |_| 1;
. _ _
2 |.| | 1', 1,
2 |_| | 1, 1,
2 | .| 2',
2 |_ _| 2;
. _ _ _
3 |.| | | 1', 1, 1,
3 |_| | | 1, 1, 1,
3 | .|.| 2', 1',
3 | |.| 2, 1',
3 | .| | 2', 1,
3 |_ _| | 2, 1,
3 | .| 3',
3 |_ _ _| 3;
. _ _ _ _
4 |.| | | | 1', 1, 1, 1,
4 |_| | | | 1, 1, 1, 1,
4 | .|.| | 2', 1', 1,
4 | |.| | 2, 1', 1,
4 | .| | | 2', 1, 1,
4 |_ _| | | 2, 1, 1,
4 | .|.| 3', 1',
4 | |.| 3, 1',
4 | .| | 3', 1,
4 |_ _ _| | 3, 1,
4 | .| | 2', 2,
4 |_ _| | 2, 2,
4 | .| 4',
4 |_ _ _ _| 4;
.
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Omar E. Pol, Jan 18 2014
STATUS
approved