OFFSET
1,6
COMMENTS
FORMULA
G.f.: 1/[(1-z(1+w+w^2))(1-wz)]. Partial sums of trinomial array A027907. - Ralf Stephan, Jan 09 2005
EXAMPLE
......................1....................
..................1...1...1................
..............1...3...4...3...1............
..........1...5..11..14..11...5...1........
......1...7..22..41..50..41..22...7..1.....
...1..9..37..92.154.182.154..92..37..9..1..
1.11.56.175.375.582.672.582.375.175.56.11.1
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Gerald McGarvey, Aug 14 2004
STATUS
approved