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A348014
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Triangle, read by rows, with row n forming the coefficients in Product_{k=0..n} (1 + k^k*x).
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1
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1, 1, 1, 1, 5, 4, 1, 32, 139, 108, 1, 288, 8331, 35692, 27648, 1, 3413, 908331, 26070067, 111565148, 86400000, 1, 50069, 160145259, 42405161203, 1216436611100, 5205269945088, 4031078400000
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OFFSET
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0,5
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LINKS
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FORMULA
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T(0,0) = 1; T(n,k) = T(n-1,k) + n^n * T(n-1,k-1).
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EXAMPLE
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Triangle begins:
1;
1, 1;
1, 5, 4;
1, 32, 139, 108;
1, 288, 8331, 35692, 27648;
1, 3413, 908331, 26070067, 111565148, 86400000;
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PROG
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(PARI) T(n, k) = if(k==0, 1, if(k==n, prod(j=1, n, j^j), T(n-1, k)+n^n*T(n-1, k-1)));
(PARI) row(n) = Vecrev(prod(k=1, n, 1+k^k*x));
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CROSSREFS
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The diagonal of the triangle is A002109.
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KEYWORD
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AUTHOR
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STATUS
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approved
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