OFFSET
1,5
COMMENTS
The row sums are powers of 3 (A000244).
EXAMPLE
........................1........................
....................1...1...1....................
................2...3...2...1...1................
............1...2...5...7...6...4...2............
........3...8..14..18..17..12...6...2...1........
.....1..3..11..25..40..49..47..35..20...9..3.....
..4.15.39..76.114.136.131.102..64..32..12..3..1..
1.4.19.58.130.229.326.381.369.297.198.108.47.16.4
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Gerald McGarvey, Aug 14 2004
STATUS
approved