OFFSET
0,5
COMMENTS
With zeros omitted, this is A173862.
FORMULA
EXAMPLE
Square array begins:
1, 1, 0, 0, 0, 0, 0, 0, ... row n=0
1, 2, 2, 0, 0, 0, 0, 0, ... row n=1
0, 2, 4, 4, 0, 0, 0, 0, ... row n=2
0, 0, 4, 8, 8, 0, 0, 0, ... row n=3
0, 0, 0, 8, 16, 16, 0, 0, ... row n=4
0, 0, 0, 0, 16, 32, 32, 0, ... row n=5
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Philippe Deléham, Mar 13 2013
STATUS
approved