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Template:Seal pyramid/Ivy/depth/2

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a
0 1 2 3 4 5 6 7 Σ
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1
2 1 1
3 2 4 6
4 3 12 13 28
5 4 24 52 40 120
6 5 40 130 200 121 496
7 6 60 260 600 726 364 2016