Template:Triangle pair StackedHeather/drop

💧    triangle DiagonalHeather    row sums Heather
k n	0	1	2	3	4	5	6	7	sums
0	1								1
1	0	1							1
2	0	0	2						2
3	0	0	0	4					4
4	0	0	0	0	8				8
5	0	0	0	0	0	16			16
6	0	0	0	0	0	0	36		36
7	0	0	0	0	0	0	0	80	80