OFFSET
0,3
LINKS
Alois P. Heinz, Rows n = 0..100, flattened
R. Stanley, Parking Functions, 2011
EXAMPLE
Triangle T(n,k) begins:
00 : 1;
01 : 1;
02 : 2;
03 : 3, 3;
04 : 5, 4;
05 : 8, 7, 5;
06 : 16, 12, 9, 6;
07 : 40, 16, 11, 7;
08 : 34, 55, 20, 13, 8;
09 : 50, 73, 70, 24, 15, 9;
10 : 125, 132, 96, 85, 28, 17, 10;
11 : 281, 212, 119, 100, 32, 19, 11;
12 : 351, 469, 267, 142, 115, 36, 21, 12;
MAPLE
p:= l-> (n-> n!*LinearAlgebra[Determinant](Matrix(n, (i, j)
-> (t->`if`(t<0, 0, l[i]^t/t!))(j-i+1))))(nops(l)):
g:= (n, i, l)-> `if`(i*(i+1)/2<n, 0, `if`(n=0, p(l)*x^
`if`(l=[], 0, l[-1]), g(n, i-1, l)+
`if`(i>n, 0, g(n-i, i-1, [i, l[]])))):
T:= n->(f->seq(coeff(f, x, i), i=ldegree(f)..degree(f)))(g(n$2, [])):
seq(T(n), n=0..20);
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Alois P. Heinz, Nov 30 2015
STATUS
approved