A383172 Expansion of e.g.f. -log(1 + log(1 - 2*x)/2)^3 / 6.
0, 0, 0, 1, 18, 295, 5115, 96838, 2012724, 45825148, 1137703140, 30643915984, 891001127016, 27835772321344, 930387252759328, 33141746095999552, 1253756533365348992, 50210676392866266880, 2122613151692627299584, 94470824166941637093376
Offset: 0
Keywords
Programs
-
PARI
a(n) = sum(k=3, n, 2^(n-k)*abs(stirling(n, k, 1)*stirling(k, 3, 1)));
Formula
a(n) = Sum_{k=3..n} 2^(n-k) * |Stirling1(n,k) * Stirling1(k,3)|.