OFFSET
0,4
COMMENTS
Row sums = A052558: (1, 1, 4, 12, 72, 360, ...).
EXAMPLE
First few rows of the triangle:
1;
0, 1;
2, 0, 2;
0, 6, 0, 6;
24, 0, 24, 0, 24;
0, 120, 0, 120, 0, 120;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Jan 09 2008
STATUS
approved