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%I #3 Oct 12 2012 14:40:20
%S 1,4,16,98,1252,39056,3235216,746947664,504955938112,1063702416056576,
%T 7035749505695570176,160587398553186610959104,
%U 12278492143557175831484111872,3469220019297527430713345352498176
%N Row sums of triangle A091039 (scaled second columns of (k,k)-Stirling2 arrays).
%F a(n)=sum(A091039(n, k), k=1..n), n>=1.
%K nonn,easy
%O 1,2
%A _Wolfdieter Lang_, Jan 23 2004