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A181690
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Riordan array T((1-x)^(-2) | 2x-1) read by rows.
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1
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-1, -4, 1, -11, 6, -1, -26, 23, -8, 1, -57, 72, -39, 10, -1, -120, 201, -150, 59, -12, 1, -247, 522, -501, 268, -83, 14, -1, -502, 1291, -1524, 1037, -434, 111, -16, 1, -1013, 3084, -4339, 3598, -1905, 656, -143, 18, -1, -2036, 7181, -11762, 11535, -7408, 3217, -942, 179, -20, 1
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OFFSET
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0,2
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COMMENTS
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LINKS
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EXAMPLE
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Array begins:
-1;
-4, 1;
-11, 6, -1;
-26, 23, -8, 1;
-57, 72, -39, 10, -1;
-120, 201, -150, 59, -12, 1;
...
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MATHEMATICA
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t[n_, k_] := t[n, k] = If[n<0, 0, If[k==0, n+3-2^(n+2), If[k>n, 0, 2 t[n-1, k] - t[n-1, k-1]]]];
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PROG
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(PARI) t(n, k) = if (n < 0, 0, if (k == 0, n + 3 - 2^(n+2), if (k >n, 0, 2*tr(n-1, k) - tr(n-1, k-1)))); \\ Michel Marcus, Feb 14 2014
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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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