OFFSET
0,5
FORMULA
EXAMPLE
Square array begins:
1, 1, 1, 0, 0, 0, 0, 0, 0, ... n = 0
1, 2, 3, 3, 0, 0, 0, 0, 0, ... n = 1
1, 3, 6, 9, 9, 0, 0, 0, 0, ... n = 2
0, 3, 9, 18, 27, 27, 0, 0, 0, ... n = 3
0, 0, 9, 27, 54, 81, 81, 0, 0, ... n = 4
0, 0, 0, 27, 81, 162, 243, 243, 0, ... n = 5
....
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Philippe Deléham, Mar 13 2013
STATUS
approved