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 A051848 #25 Oct 19 2022 06:44:08 %S A051848 1,9,373,48913,13717421,6698798233,5057809205989,5465701947765793, %T A051848 8008631808527689309,15287592943577781017641, %U A051848 36867279706750843040346261,109619115381793714510485861169,393991653133258067890987154457613,1683967033137904529927995135566966713 %N A051848 Bisection of A023811, divided by the term position. %F A051848 a(n) = A023811(2n)/(2n-1). [Corrected by _Alexander R. Povolotsky_, Oct 15 2022] %F A051848 a(n) = A221741(2n-1). - _Alexander R. Povolotsky_, Oct 15 2022 %o A051848 (PARI) f(n) = (n^n-n^2)\(n-1)^2+1; \\ A023811 %o A051848 a(n) = f(2*n)/(2*n-1); \\ _Michel Marcus_, Oct 16 2022 %Y A051848 Cf. A023811, A051847, A221741. %K A051848 easy,nonn %O A051848 1,2 %A A051848 _Antti Karttunen_, Dec 13 1999 %E A051848 a(13) and a(14) added by _Alexander R. Povolotsky_, Oct 16 2022