This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A231292 #5 Jan 17 2022 12:06:09
%S A231292 1,1,27,625,161051,85766121,271818611107,2724905250390625,
%T A231292 125015825667824393931,21259046894411315872085401,
%U A231292 15087863296794400779633937999667,41840013551409555494294964922119140625,470091178834036922915254196307625156782873691
%N A231292 a(n) = Jacobsthal(n)^n, where Jacobsthal(n) = A001045(n), for n>=1.
%F A231292 a(n) = (2^n - (-1)^n)^n / 3^n.
%F A231292 One-third the logarithmic derivative of A211893.
%t A231292 Module[{nn=20},#[[1]]^#[[2]]&/@Thread[{Rest[LinearRecurrence[{1,2},{0,1},nn+1]],Range[nn]}]] (* _Harvey P. Dale_, Jan 17 2022 *)
%o A231292 (PARI) {a(n)=(2^n-(-1)^n)^n/3^n}
%o A231292 for(n=1, 15, print1(a(n), ", "))
%Y A231292 Cf. A211893, A231279.
%K A231292 nonn
%O A231292 1,3
%A A231292 _Paul D. Hanna_, Nov 06 2013