OFFSET
0,5
COMMENTS
FORMULA
T(i, j)=T(i-1, j)-T(i, j-1)+2*T(i-1, j-1), with T(i, 0)=1 and T(i, j)=0 if j>i.
EXAMPLE
Table starts {1},{1,1},{1,2,0},{1,3,1,-1},{1,4,3,-2,0},{1,5,6,-2,-2,2}
MATHEMATICA
T[_, 0]:=1; T[0, 0]:=1; T[i_, j_]/; j>i:=0; T[i_, j_]:=T[i, j]=T[i-1, j]-T[i, j-1]+2 T[i-1, j-1]
CROSSREFS
KEYWORD
sign,tabl
AUTHOR
Wouter Meeussen, May 06 2004
STATUS
approved