OFFSET
1,10
LINKS
Lars Blomberg, Table of n, a(n) for n = 1..9870 (the first 140 rows)
EXAMPLE
Triangle begins:
0
0,0
0,0,0
0,0,0,4
0,2,0,0,4
0,0,0,0,0,8
0,2,2,0,0,0,8
0,0,0,0,0,0,0,12
0,2,2,2,4,0,0,0,12
0,0,0,4,0,0,0,0,0,16
0,2,2,2,2,0,0,0,0,0,16
0,0,0,0,0,0,0,0,0,0,0,20
0,2,2,2,2,6,4,4,4,0,0,0,20
-------
The obtuse angle is 'o'.
For n=4, k=4:
x... x... ...x ...x
..o. .... .o.. ....
.... .o.. .... ..o.
...x ...x x... x...
So T(4,4)=4
-------
For n=5, k=2:
x...x ..o..
..o.. x...x
So T(5,2)=2
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Lars Blomberg, Feb 27 2017
STATUS
approved