OFFSET
1,2
LINKS
W. Lang, On generalizations of Stirling number triangles, J. Integer Seqs., Vol. 3 (2000), #00.2.4.
FORMULA
a(n, m) = 5*(5*m-n+1)*a(n-1, m)/n + m*a(n-1, m-1)/n, n >= m >= 1; a(n, m) := 0, n<m; a(n, 0) := 0; a(1, 1)=1. G.f. for m-th column: (x*p(4, x))^m, p(4, x) := 1+10*x+50*x^2+125*x^3+125*x^4 (row polynomial of A033842(4, m)).
EXAMPLE
{1}; {10,1}; {50,20,1}; {125,200,30,1}; {125,1250,450,40,1}; ...
CROSSREFS
KEYWORD
AUTHOR
STATUS
approved