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A294582 Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of Product_{j>=1} 1/(1 - j^k*x^j)^j. 2

%I #16 Nov 04 2017 08:11:06

%S 1,1,1,1,1,3,1,1,5,6,1,1,9,14,13,1,1,17,36,42,24,1,1,33,98,148,103,48,

%T 1,1,65,276,546,489,289,86,1,1,129,794,2068,2467,1959,690,160,1,1,257,

%U 2316,7962,12969,14281,6326,1771,282,1,1,513,6818,30988,70243

%N Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of Product_{j>=1} 1/(1 - j^k*x^j)^j.

%H Seiichi Manyama, <a href="/A294582/b294582.txt">Antidiagonals n = 0..139, flattened</a>

%F A(0,k) = 1 and A(n,k) = (1/n) * Sum_{j=1..n} (Sum_{d|j} d^(2+k*j/d)) * A(n-j,k) for n > 0.

%e Square array begins:

%e 1, 1, 1, 1, 1, ...

%e 1, 1, 1, 1, 1, ...

%e 3, 5, 9, 17, 33, ...

%e 6, 14, 36, 98, 276, ...

%e 13, 42, 148, 546, 2068, ...

%Y Columns k=0..2 give A000219, A266941, A285674.

%Y Rows n=0-1 give A000012.

%Y Cf. A292193, A294580.

%K nonn,tabl

%O 0,6

%A _Seiichi Manyama_, Nov 02 2017

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Last modified April 23 09:48 EDT 2024. Contains 371905 sequences. (Running on oeis4.)