A178535 Matrix inverse of A178534.

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, 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, -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

Offset

1,2

Comments

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

Links

Table of n, a(n) for n=1..91.

Example

Table begins:
   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  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
  -1 -1  0 -1  0 -1  0 -1  0 -1  1

Maple

A178535 := proc(n, l)
    option remember;
    a := 0 ;
    if n = l then
        a := 1 ;
    end if;
    for k from l to n-1 do
        a := a-A178534(n, k)*procname(k, l) ;
    end do:
    a/A178534(n, n) ;
end proc:
seq(seq(A178535(n, k), k=1..n), n=1..12) ; # R. J. Mathar, Oct 28 2010

Mathematica

nmax = 13;
(* T is A178534 *)
T[n_, 1] := Fibonacci[n+1];
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}]];
A178535 = Inverse[Array[T, {nmax, nmax}]];
Table[A178535[[n, k]], {n, 1, nmax}, {k, 1, n}] // Flatten (* Jean-François Alcover, Feb 23 2024 *)

Crossrefs

Cf. First column is A178536.

Sequence in context: A050372 A037802 A037879 * A025449 A047988 A037818

Adjacent sequences: A178532 A178533 A178534 * A178536 A178537 A178538

Keyword

sign,tabl

Author

Mats Granvik, May 29 2010

Status

approved