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Template:Seal pyramid/Ivy/depth/sum

From Wikiversity
v
a
0 1 2 3 4 5 6 7 Σ
0 1 1
1 1 1
2 1 2 3
3 1 4 6 11
4 1 6 18 26 51
5 1 8 36 104 158 307
6 1 10 60 260 790 1330 2451
7 1 12 90 520 2370 7980 15414 26387