OFFSET
0,5
COMMENTS
In a convex n-gon, the number of paths using k-1 diagonals and k non-repeated vertices, start and end vertices are not connected by a side.
FORMULA
EXAMPLE
n\k 0 1 2 3 4 5 6 7 8
0 1
1 1 1
2 1 2 0
3 1 3 0 0
4 1 4 4 0 0
5 1 5 10 0 0 10
6 1 6 18 12 24 60 36
7 1 7 28 42 112 280 420 322
8 1 8 40 96 336 1040 2400 3696 2832
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Xiangyu Chen, Nov 12 2020
STATUS
approved