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 A095890 #7 Sep 06 2022 14:08:19
%S A095890 1,2,1,9,2,1,64,9,2,1,625,64,9,2,1,7776,625,64,9,2,1,117649,7776,625,
%T A095890 64,9,2,1,2097152,117649,7776,625,64,9,2,1,43046721,2097152,117649,
%U A095890 7776,625,64,9,2,1,1000000000,43046721,2097152,117649,7776,625,64,9,2,1
%N A095890 Triangle read by rows: T(n,k) = (n-k+1)^(n-k), n>=1, 1<=k<=n.
%H A095890 Reinhard Zumkeller, <a href="/A095890/b095890.txt">Rows n = 1..120 of triangle, flattened</a>
%t A095890 Table[(n-k+1)^(n-k),{n,10},{k,n}]//Flatten (* _Harvey P. Dale_, Sep 06 2022 *)
%o A095890 (Haskell)
%o A095890 a095890 n k = (n - k + 1) ^ (n - k)
%o A095890 a095890_row n = map (a095890 n) [1..n]
%o A095890 a095890_tabl = map a095890_row [1..]
%o A095890 -- _Reinhard Zumkeller_, Jul 07 2013
%K A095890 easy,nonn,tabl
%O A095890 1,2
%A A095890 Herman Jamke (hermanjamke(AT)fastmail.fm), Jul 10 2004