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A144791
Euler transform of A141199.
1
1, 4, 11, 34, 93, 269, 735, 2037, 5515, 14912, 39828, 105931, 279408, 733409, 1913349, 4968092, 12835746, 33020764, 84586922, 215844162, 548725545, 1390140594, 3510064528, 8834980324, 22171254453, 55479601543, 138448505906, 344594242788, 855538158016
OFFSET
1,2
LINKS
Thomas Wieder, The number of certain rankings and hierarchies formed from labeled or unlabeled elements and sets, Applied Mathematical Sciences, vol. 3, 2009, no. 55, 2707 - 2724. [Thomas Wieder, Nov 14 2009]
FORMULA
G.f.: 1 / Product_{k>=1} (1 - x^k)^A141199(k).
a(n) = (1/n)*Sum_{k=1..n-1} c(k) A141199(n-k),
where c(n) = Sum_{k|n} k*A141199(k).
CROSSREFS
KEYWORD
nonn
AUTHOR
Thomas Wieder, Sep 21 2008
EXTENSIONS
More terms from Alois P. Heinz, Apr 21 2012
STATUS
approved