OFFSET
1,3
LINKS
Sergi Elizalde, Descents on quasi-Stirling permutations, arXiv:2002.00985 [math.CO], 2020. See p. 7.
EXAMPLE
Triangle begins
1;
1, 3;
1, 13, 16;
1, 39, 171, 125;
1, 101, 1091, 2551, 1296;
1, 243, 5498, 28838, 43653, 16807;
PROG
(PARI)
A(t, z) = (1-t)/(1 - t*exp((1-t)*z));
Q(n, t) = (n!/(n+1))*polcoeff(A(t, z)^(n+1), n, z);
row(n) = my(rowx = Vec(Q(n, t))); vector(n, k, rowx[k]);
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Michel Marcus, Feb 05 2020
STATUS
approved