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%I #9 Sep 08 2022 08:45:10
%S 1,9,141,2893,73081,2200977,77189509,3095295861,139872233073,
%T 7039013063065,390656716635901,23714578436644509,1563646420268423401,
%U 111315499088924632353,8511391223995285616373,695805743909499121660357
%N A diagonal of number array A083075.
%H Vincenzo Librandi, <a href="/A083084/b083084.txt">Table of n, a(n) for n = 0..300</a>
%F a(n) = ((n+3)*(2n+9)^n + 1)/(n+4).
%o (Magma) [((n+3)*(2*n+9)^n+1)/(n+4): n in [0..20]]; // _Vincenzo Librandi_, Nov 12 2011
%Y Cf. A083083, A083082.
%K easy,nonn
%O 0,2
%A _Paul Barry_, Apr 23 2003
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