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%I #4 Mar 11 2015 19:39:05
%S 0,3,23,141,848,5190,32835,216006,1480524,10574613,78652940,608539283,
%T 4891327374,40788987473,352412667201,3150522213345,29106469066976,
%U 277557448176080,2728859399410797,27631899836521084,287875667322386270,3082851976122478749
%N Number of collections of nonempty multisets with a total of n+2 objects of exactly n colors.
%H Alois P. Heinz, <a href="/A255952/b255952.txt">Table of n, a(n) for n = 0..250</a>
%F a(n) = A255903(n+2,n).
%Y A diagonal of A255903.
%K nonn
%O 0,2
%A _Alois P. Heinz_, Mar 11 2015