OFFSET
0,3
COMMENTS
The convexity of a permutation in one-line notation is the maximal value of twice an entry minus the sum of its neighbors.
The row lengths are 2n-2 starting for n>=3.
Row sums give A000142.
LINKS
FindStat - Combinatorial Statistic Finder, The convexity of a permutation.
EXAMPLE
Triangle begins:
1
1
2
4 0 0 2
6 2 0 8 4 4
8 6 2 28 20 32 12 12
8 16 6 106 80 156 120 132 48 48
...
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Christian Stump, Oct 26 2015
EXTENSIONS
More terms from Alois P. Heinz, Oct 26 2015
STATUS
approved