OFFSET
0,9
COMMENTS
Diagonal sums : A097333 .
FORMULA
Sum_{k, 0<=k<=2n}T(n,k)=2^(n+1).
EXAMPLE
Triangle begins : 1,1 ; 1,1,1,1 ; 1,1,2,2,1,1 ; 1,1,3,3,3,3,1,1, ; 1,1,4,4,6,6,4,4,1,1 ; 1,1,5,5,10,10,10,10,5,5,1,1 ; ...
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Philippe Deléham, Dec 14 2008
EXTENSIONS
Typo in a(74) corrected by Georg Fischer, May 26 2024
STATUS
approved