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%I #12 Sep 08 2022 08:45:10
%S 1,5,61,1065,23801,650893,21120373,794552657,34040573425,
%T 1637411510421,87420145670573,5131440522974329,328542298690792681,
%U 22789709877615373085,1702810951672313083621,136361486383932674632353
%N First subdiagonal of number array A083075.
%H Vincenzo Librandi, <a href="/A083082/b083082.txt">Table of n, a(n) for n = 0..300</a>
%F a(n) = ((n+1)*(2n+5)^n + 1)/(n+2).
%t Table[((n+1)(2n+5)^n+1)/(n+2),{n,0,20}] (* _Harvey P. Dale_, Oct 06 2019 *)
%o (Magma) [((n+1)*(2*n+5)^n+1)/(n+2): n in [0..20]]; // _Vincenzo Librandi_, Nov 12 2011
%Y Cf. A083080, A083083.
%K easy,nonn
%O 0,2
%A _Paul Barry_, Apr 23 2003
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