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A111540 Matrix inverse of triangle A111536. 3

%I #6 Jun 13 2017 22:31:43

%S 1,-1,1,-2,-2,1,-8,-2,-3,1,-44,-8,-2,-4,1,-296,-44,-8,-2,-5,1,-2312,

%T -296,-44,-8,-2,-6,1,-20384,-2312,-296,-44,-8,-2,-7,1,-199376,-20384,

%U -2312,-296,-44,-8,-2,-8,1,-2138336,-199376,-20384,-2312,-296,-44,-8,-2,-9,1,-24936416,-2138336,-199376,-20384,-2312,-296

%N Matrix inverse of triangle A111536.

%C The column sequences are derived from the logarithm of a factorial series (cf. A111537).

%F T(n, n)=1 and T(n+1, n)=n+1, else T(n+k+1, k) = -A111537(k) for k>=1.

%e Triangle begins:

%e 1;

%e -1,1;

%e -2,-2,1;

%e -8,-2,-3,1;

%e -44,-8,-2,-4,1;

%e -296,-44,-8,-2,-5,1;

%e -2312,-296,-44,-8,-2,-6,1;

%e -20384,-2312,-296,-44,-8,-2,-7,1;

%e -199376,-20384,-2312,-296,-44,-8,-2,-8,1; ...

%e After initial terms, all columns are equal to -A111537.

%o (PARI) T(n,k)=if(n<k || k<0,0,if(n==k,1,if(n==k+1,-n, -(n-k-1)*polcoeff(log(sum(i=0,n,(i+1)!/1!*x^i)),n-k-1))))

%Y Cf. A111536, A111537.

%K sign,tabl

%O 0,4

%A _Paul D. Hanna_, Aug 06 2005

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)