OFFSET
1,2
COMMENTS
Consecutive columns (i.e. k =1,2,3...) shift the Lucas sequence (A000204) down by 2 indices.
Diagonal (n=k) produces A061084, and Lucas numbers at increasingly negative indices for n=k>2.
FORMULA
T(n,1) = A000204(n) for n>0, T(n,k) = T(n,k-1) - T(n-1,k-1).
EXAMPLE
Triangle begins:
1;
3, 2;
4, 1, -1;
7, 3, 2, 3;
11, 4, 1, -1, -4;
18, 7, 3, 2, 3, 7;
29, 11, 4, 1, -1, -4, -11;
47, 18, 7, 3, 2, 3, 7, 18;
76, 29, 11, 4, 1, -1, -4, -11, -29;
...
CROSSREFS
KEYWORD
sign,tabl
AUTHOR
Richard R. Forberg, Jul 31 2013
STATUS
approved