OFFSET
0,5
COMMENTS
Row sums are: {1, 2, -6, 382, -44266, 14199486, -12902262302, 33831855287198,
-258898313695820850, 5823405140242006622494, -386839522966544578870468774, ...}.
LINKS
G. C. Greubel, Rows n = 0..25 of triangle, flattened
FORMULA
T(n,k) = T(n,n-k).
EXAMPLE
Triangle starts as:
1;
1, 1;
1, -8, 1;
1, 190, 190, 1;
1, -14822, -14624, -14822, 1;
1, 3557278, 3542464, 3542464, 3557278, 1;
MATHEMATICA
b[n_, q_]:= b[n, q]= If[n==0, 0, (1-q^n)*b[n-1, q] +1];
T[n_, k_, q_]:= 1 + b[n, q] -b[n-k, q] - b[k, q];
Table[T[n, k, 3], {n, 0, 10}, {k, 0, n}]//Flatten (* modified by G. C. Greubel, Dec 07 2019 *)
PROG
(PARI) b(n, q) = if(n==0, 0, 1 + (1-q^n)*b(n-1, q) );
T(n, k, q) = 1 + b(n, q) - b(n-k, q) - b(k, q);
for(n=0, 10, for(k=0, n, print1(T(n, k, 3), ", "))) \\ G. C. Greubel, Dec 07 2019
(Magma)
function b(n, q)
if n eq 0 then return 0;
else return 1 - (q^n-1)*b(n-1, q);
end if; return b; end function;
function T(n, k, q) return 1 + b(n, q) - b(n-k, q) - b(k, q); end function;
[ T(n, k, 3) : k in [0..n], n in [0..10]]; // G. C. Greubel, Dec 07 2019
(Sage)
@CachedFunction
def b(n, q):
if (n==0): return 0
else: return 1 - (q^n-1)*b(n-1, q)
def T(n, k, q): return 1 + b(n, q) - b(n-k, q) - b(k, q)
[[T(n, k, 3) for k in (0..n)] for n in (0..10)] # G. C. Greubel, Dec 07 2019
(GAP)
b:= function(n, q)
if n=0 then return 0;
else return 1 - (q^n-1)*b(n-1, q);
fi; end;
T:= function(n, k, q) return 1 + b(n, q) - b(n-k, q) - b(k, q); end;
Flat(List([0..10], n-> List([0..n], k-> T(n, k, 3) ))); # G. C. Greubel, Dec 07 2019
CROSSREFS
KEYWORD
sign,tabl
AUTHOR
Roger L. Bagula, Apr 15 2010
EXTENSIONS
Edited by G. C. Greubel, Dec 07 2019
STATUS
approved