Template:Seal pyramid/Wisteria/pennon weight/2

d a	0	1	2	3	4	5	6	7	Σ
0
1
2			1						1
3			3						3
4			6	6					12
5			10	40	10				60
6			15	165	195	15			390
7			21	546	1890	840	21		3318