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 A111454 #13 Aug 14 2020 19:47:32
%S A111454 0,0,0,18,400,7850,162288,3667650,91171008,2486784402,74062575400,
%T A111454 2395420006034,83695120256592,3143661612445146,126375169532421600,
%U A111454 5415486851106043650,246486713303685957376
%N A111454 a(n) = (n-4)^(n-3) - (n-3)^(n-4) + 1.
%H A111454 Harvey P. Dale, <a href="/A111454/b111454.txt">Table of n, a(n) for n = 4..389</a>
%F A111454 a(n) = A007925(n-4) + 1. - _Mathew Englander_, Aug 14 2020
%t A111454 Table[(n-4)^(n-3)-(n-3)^(n-4)+1,{n,4,20}] (* _Harvey P. Dale_, Oct 05 2019 *)
%Y A111454 Cf. A007925.
%K A111454 nonn
%O A111454 4,4
%A A111454 Robert J. Reid (greencroft57(AT)yahoo.co.uk), Nov 14 2005
%E A111454 More terms from _R. J. Mathar_, Feb 26 2008