OFFSET
0,3
COMMENTS
FORMULA
Rows have g.f. (1-2x)(1-x)^(n-1)/(1-3x)^(n+1).
EXAMPLE
Read by antidiagonals, the array appears as {1}, {1,2},{1,4,5}, {1,6,15,14}, {1,8,29,54,41},...
CROSSREFS
KEYWORD
AUTHOR
Paul Barry, Mar 16 2003
STATUS
approved