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%I #5 Apr 12 2014 19:59:00
%S 1,4,17,92,633,5316,52609,598444,7685705,109933268,1732565841,
%T 29824133436,556682481817,11198025452260,241481216430113,
%U 5557135898411468,135927902927547369,3521462566184392692,96323049885512803825,2774010846129897006940
%N Total number of preferential arrangements of 1, 2, ..., n things.
%C Although A217389 = a(n)+1 already exists, it is this sequence that one really needs.
%F a(n) = Sum_{k=1..n} A000670(k).
%Y Cf. A000670, A217389.
%K nonn
%O 1,2
%A _N. J. A. Sloane_, Apr 12 2014
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