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A241747
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Triangle read by rows: T(n,k) = (4*n+3)*(4*k+3).
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1
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9, 21, 49, 33, 77, 121, 45, 105, 165, 225, 57, 133, 209, 285, 361, 69, 161, 253, 345, 437, 529, 81, 189, 297, 405, 513, 621, 729, 93, 217, 341, 465, 589, 713, 837, 961, 105, 245, 385, 525, 665, 805, 945, 1085, 1225, 117, 273, 429, 585, 741, 897, 1053, 1209, 1365, 1521
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OFFSET
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0,1
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COMMENTS
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Row sums give the second bisection of A002414: 9, 70, 231, 540, 1045, 1794, 2835, 4216, ... [Bruno Berselli, May 08 2014]
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LINKS
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EXAMPLE
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Triangle begins:
n\k | 0 1 2 3 4 5 6 7 8 9
----|--------------------------------------------------------
0 | 9;
1 | 21, 49;
2 | 33, 77, 121;
3 | 45, 105, 165, 225;
4 | 57, 133, 209, 285, 361;
5 | 69, 161, 253, 345, 437, 529;
6 | 81, 189, 297, 405, 513, 621, 729;
7 | 93, 217, 341, 465, 589, 713, 837, 961;
8 | 105, 245, 385, 525, 665, 805, 945, 1085, 1225;
9 | 117, 273, 429, 585, 741, 897, 1053, 1209, 1365, 1521;
.....
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MATHEMATICA
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t[n_, k_] := (4 n + 3) (4 k + 3); Table[t[n, k], {n, 0, 10}, {k, n}] // Flatten
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PROG
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(Magma) [(4*n+3)*(4*k+3): k in [0..n], n in [0..15]]; /* or, as triangle: */ [[(4*n+3)*(4*k+3): k in [0..n]]: n in [0..10]];
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CROSSREFS
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KEYWORD
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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