A381107 Expansion of e.g.f. -log(1-x) * (exp(x) - 1) / (1-x).
0, 0, 2, 12, 66, 395, 2665, 20307, 173488, 1646745, 17216653, 196730567, 2440331300, 32666847941, 469457190501, 7210003071247, 117862325748960, 2043420738374545, 37453428525580725, 723643767046525111, 14700326905250293556, 313236372986056228013, 6985951253209713959645
Offset: 0
Keywords
Programs
-
PARI
a(n) = sum(k=0, n-1, binomial(n, k)*abs(stirling(k+1, 2, 1)));