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 A083070 #5 Mar 28 2024 21:54:38 %S A083070 1,5,43,469,6221,98041,1797559,37665881,888888889,23343682141, %T A083070 675462155171,21356578028941,732659790696133,27107717023577009, %U A083070 1076060070966390511,45619867383437689201,2057328526812890853617 %N A083070 First superdiagonal of number array A083064. %F A083070 a(n) = ((n-1)*(n+1)^n + 1)/n. %Y A083070 Cf. A083069, A083071. %K A083070 easy,nonn %O A083070 1,2 %A A083070 _Paul Barry_, Apr 21 2003