OFFSET
0,2
COMMENTS
FORMULA
Number triangle T(n, k)=(-1)^(n-k)*sum{j=0..n, binomial(n, k+j)}
T(n,k)=T(n-1,k-1)-3*T(n-1,k)+2*T(n-2,k-1)-2*T(n-2,k), T(0,0)=1, T(1,0)=-2, T(1,1)=1, T(n,k)=0 if k<0 or if k>n. - Philippe Deléham, Jan 12 2014
EXAMPLE
Rows start {1}, {-2,1}, {4,-3,1}, {-8,7,-4,1},...
CROSSREFS
KEYWORD
AUTHOR
Paul Barry, Jan 30 2005
STATUS
approved