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A093855 Triangle read by rows: T(n,m) = number of T_0-multigraphs with n edges and m vertices(n>=2, 3<=m<=2*n). 0

%I #4 May 10 2013 12:45:31

%S 3,12,7,44,80,0,12,111,440,840,630,0,18,234,1532,6048,13692,13440,0,0,

%T 25,441,4270,26740,106792,248696,277200,75600,0,0,33,768,10360,92940,

%U 557322,2169416,5158512,6617520,3326400,0,0,0

%N Triangle read by rows: T(n,m) = number of T_0-multigraphs with n edges and m vertices(n>=2, 3<=m<=2*n).

%F E.g.f.: (1+x)*exp(-x-x^2/2*y/(1-y))*Sum((1-y)^(-binomial(n, 2))*x^n/n!, n=0..infinity).

%e 3,12; 7,44,80,0; 12,111,440,840,630,0; 18,234,1532,6048,13692,13440,0,0; 25,441,4270,26740,106792,248696,277200,75600,0,0;

%e 33,768,10360,92940,557322,2169416,5158512,6617520,3326400,0,0,0; ...

%K nonn,tabf

%O 2,1

%A Goran Kilibarda, _Vladeta Jovovic_, May 21 2004

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Last modified June 6 12:03 EDT 2024. Contains 373128 sequences. (Running on oeis4.)