OFFSET
1,137
COMMENTS
LINKS
Alois P. Heinz, Rows n = 1..350, flattened
FORMULA
G.f.: sum(t^(2j-1)*x^(2j-1)*product(1+x^(2i-1), i=1..j-1), j=1..infinity).
EXAMPLE
T(20,11)=2 because we have [11,9] and [11,5,3,1].
T(30,17)=3 because we have [17,13],[17,9,3,1] and [17,7,5,1].
Triangle starts:
1;
0;
0,0,1;
0,0,1;
0,0,0,0,1;
0,0,0,0,1;
0,0,0,0,0,0,1;
0,0,0,0,1,0,1;
...
MAPLE
g:=sum(t^(2*j-1)*x^(2*j-1)*product(1+x^(2*i-1), i=1..j-1), j=1..30): gser:=simplify(series(g, x=0, 22)): for n from 1 to 20 do P[n]:=sort(coeff(gser, x^n)) od: for n from 1 to 20 do seq(coeff(P[n], t^j), j=1..2*ceil(n/2)-1) od; # yields sequence in triangular form
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Emeric Deutsch, Feb 24 2006
STATUS
approved