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A340424
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Triangle read by rows: T(n,k) = A024916(n-k+1)*A002865(k-1), 1 <= k <= n.
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6
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1, 4, 0, 8, 0, 1, 15, 0, 4, 1, 21, 0, 8, 4, 2, 33, 0, 15, 8, 8, 2, 41, 0, 21, 15, 16, 8, 4, 56, 0, 33, 21, 30, 16, 16, 4, 69, 0, 41, 33, 42, 30, 32, 16, 7, 87, 0, 56, 41, 66, 42, 60, 32, 28, 8, 99, 0, 69, 56, 82, 66, 84, 60, 56, 32, 12, 127, 0, 87, 69, 112, 82, 132, 84, 105, 64, 48, 14
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OFFSET
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1,2
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COMMENTS
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Conjecture: the sum of row n equals A066186(n), the sum of all parts of all partitions of n.
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LINKS
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EXAMPLE
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Triangle begins:
1;
4, 0;
8, 0, 1;
15, 0, 4, 1;
21, 0, 8, 4, 2;
33, 0, 15, 8, 8, 2;
41, 0, 21, 15, 16 8, 4;
56, 0, 33, 21, 30, 16, 16, 4;
69, 0, 41, 33, 42, 30, 32, 16, 7;
87, 0, 56, 41, 66, 42, 60, 32, 28, 8;
99, 0, 69, 56, 82, 66, 84, 60, 56, 32, 12;
...
For n = 6 the calculation of every term of row 6 is as follows:
--------------------------
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1 1 * 33 = 33
2 0 * 21 = 0
3 1 * 15 = 15
4 1 * 8 = 8
5 2 * 4 = 8
6 2 * 1 = 2
--------------------------
The sum of row 6 is 33 + 0 + 15 + 8 + 8 + 2 = 66, equaling A066186(6) = 66.
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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