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A306629 Square array A(n,k), n>=0, k>=0, read by antidiagonals, where column k is the expansion of 1/(Sum_{j>=0} (j!)^k * x^j). 2

%I #19 Mar 05 2019 01:53:38

%S 1,1,-1,1,-1,0,1,-1,-1,0,1,-1,-3,-3,0,1,-1,-7,-29,-13,0,1,-1,-15,-201,

%T -499,-71,0,1,-1,-31,-1265,-13351,-13101,-461,0,1,-1,-63,-7713,

%U -328975,-1697705,-486131,-3447,0,1,-1,-127,-46529,-7946143,-206659569,-369575303,-24266797,-29093,0

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

%H Seiichi Manyama, <a href="/A306629/b306629.txt">Antidiagonals n = 0..59, flattened</a>

%F A(0,k) = 1 and A(n,k) = -Sum_{j=1..n} (j!)^k * A(n-j,k) for n > 0.

%e Square array begins:

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

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

%e 0, -1, -3, -7, -15, ...

%e 0, -3, -29, -201, -1265, ...

%e 0, -13, -499, -13351, -328975, ...

%e 0, -71, -13101, -1697705, -206659569, ...

%e 0, -461, -486131, -369575303, -268312660751, ...

%Y Columns 1-3 give A167894, A113871, A316862.

%Y Rows 0-2 give A000012, (-1)*A000012, (-1)*A000225.

%Y Main diagonal gives A306630.

%K sign,tabl

%O 0,13

%A _Seiichi Manyama_, Mar 02 2019

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Last modified August 2 16:11 EDT 2024. Contains 374848 sequences. (Running on oeis4.)