30 (RANK = 3)
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6 10 15 (RANK = 2)
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2 3 5 (RANK = 1)
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1 (RANK = 0)
Please note the ranking distribution: 1 of R = 0; 3 of R = 1; 3 of R = 2; 1 of R = 3.
This distribution of 1, 3, 3, 1 is the third row of a Pascal or
Binomial Table.