%I #7 Nov 23 2021 12:09:39

%S 1,31,381,3431,26769,193705,1343521,9091270,60632419,401001030,

%T 2639871326,17339260251,113792427233,746807661549,4903854042841,

%U 32227106641988,211992209767971,1395903036647155,9200826759772935

%N Column 2 of triangle A108267.

%o (PARI)

%o a(n)=polcoeff((1-x)^(n+1)*sum(j=0,n,binomial(n+n*j+j,n*j+j)*x^j),2)

%Y Cf. A108267.

%K nonn

%O 2,2

%A _Paul D. Hanna_, May 29 2005

%E Offset corrected by _Andrey Zabolotskiy_, Nov 23 2021