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A053202
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Pascal's triangle (excluding first, last two elements of each row) read by rows, row n read mod n.
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5
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2, 0, 0, 3, 2, 3, 0, 0, 0, 0, 4, 0, 6, 0, 4, 0, 3, 0, 0, 3, 0, 5, 0, 0, 2, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, 6, 4, 3, 0, 0, 0, 3, 4, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 7, 0, 7, 0, 7, 2, 7, 0, 7, 0, 7, 0, 5, 0, 3, 10, 0, 0, 10, 3, 0, 5, 0, 8, 0, 12, 0, 8, 0, 6, 0, 8, 0, 12, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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4,1
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COMMENTS
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Prime numbered rows contain all zeros.
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LINKS
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EXAMPLE
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Triangle begins:
2;
0, 0;
3, 2, 3;
0, 0, 0, 0;
4, 0, 6, 0, 4;
...
row 8 = 28 mod 8, 56 mod 8, 70 mod 8, 56 mod 8, 28 mod 8 = 4, 0, 6, 0, 4.
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MATHEMATICA
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Table[Mod[Binomial[n, k], n], {n, 4, 18}, {k, 2, n-2}] // Flatten (* Jean-François Alcover, Jun 06 2017 *)
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PROG
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(Haskell)
a053202 n k = a053202_tabl !! (n - 4) !! k
a053202_row n = a053202_tabl !! (n - 4)
a053202_tabl = zipWith (\k row -> take (k - 3) $ drop 2 row)
[4..] $ drop 4 a053200_tabl
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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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