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A178535 Matrix inverse of A178534. 3

%I #10 Feb 23 2024 04:25:25

%S 1,-2,1,-1,-1,1,0,-1,-1,1,-1,-1,0,-1,1,1,0,-2,0,-1,1,-1,-1,0,-1,0,-1,

%T 1,0,0,0,-1,-1,0,-1,1,0,0,-1,-1,0,-1,0,-1,1,1,0,-1,1,-2,0,-1,0,-1,1,

%U -1,-1,0,-1,0,-1,0,-1,0,-1,1,0,1,1,-1,0,-1,-1,0,-1,0,-1,1,-1,-1,0,-1,0,-1,0,-1,0,-1,0,-1,1

%N Matrix inverse of A178534.

%C Except for first term row sums equal a signed version of A023022.

%e Table begins:

%e 1

%e -2 1

%e -1 -1 1

%e 0 -1 -1 1

%e -1 -1 0 -1 1

%e 1 0 -2 0 -1 1

%e -1 -1 0 -1 0 -1 1

%e 0 0 0 -1 -1 0 -1 1

%e 0 0 -1 -1 0 -1 0 -1 1

%e 1 0 -1 1 -2 0 -1 0 -1 1

%e -1 -1 0 -1 0 -1 0 -1 0 -1 1

%p A178535 := proc(n, l)

%p option remember;

%p a := 0 ;

%p if n = l then

%p a := 1 ;

%p end if;

%p for k from l to n-1 do

%p a := a-A178534(n, k)*procname(k, l) ;

%p end do:

%p a/A178534(n, n) ;

%p end proc:

%p seq(seq(A178535(n,k),k=1..n),n=1..12) ; # _R. J. Mathar_, Oct 28 2010

%t nmax = 13;

%t (* T is A178534 *)

%t T[n_, 1] := Fibonacci[n+1];

%t T[n_, k_] := T[n, k] = If[k > n, 0, Sum[T[n-i, k-1], {i, 1, k-1}] - Sum[T[n-i, k], {i, 1, k-1}]];

%t A178535 = Inverse[Array[T, {nmax, nmax}]];

%t Table[A178535[[n, k]], {n, 1, nmax}, {k, 1, n}] // Flatten (* _Jean-François Alcover_, Feb 23 2024 *)

%Y Cf. First column is A178536.

%K sign,tabl

%O 1,2

%A _Mats Granvik_, May 29 2010

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Last modified August 23 10:16 EDT 2024. Contains 375379 sequences. (Running on oeis4.)