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A176299 Variant sequence A169652, with a(1)=1 and a(2)=3.

%I A176299 #12 May 09 2021 05:09:57
%S A176299 1,3,16,400,176400,31265312400,977530816165936208400,
%T A176299 955566496615167328821016225384209913664400,
%U A176299 913107329453384594090655605142589591944555936335177523176387250981965992675658480400
%N A176299 Variant sequence A169652, with a(1)=1 and a(2)=3.
%C A176299 Except for first two terms, sqrt(a(n+1)/a(n)) = A144780(n).
%H A176299 Indranil Ghosh, <a href="/A176299/b176299.txt">Table of n, a(n) for n = 1..12</a>
%t A176299 a={1,3};Do[AppendTo[a,Total[a]^2],{9}];a (* _Indranil Ghosh_, Feb 20 2017 *)
%o A176299 (Python)
%o A176299 #Program to generate the b-file
%o A176299 lst=[1,3]
%o A176299 print("1 1")
%o A176299 print("2 3")
%o A176299 i=3
%o A176299 a=sum(lst)**2
%o A176299 while i<=12:
%o A176299     print(str(i)+" "+str(a))
%o A176299     lst.append(a)
%o A176299     i+=1
%o A176299     a=sum(lst)**2 # _Indranil Ghosh_, Feb 20 2017
%K A176299 nonn
%O A176299 1,2
%A A176299 _Giovanni Teofilatto_, Apr 14 2010