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 A351696 #6 Feb 26 2022 10:50:03 %S A351696 385,3289,1729,53041,146329,38665,741169,1449721,294409,4582249, %T A351696 7568185,1335961,18477481,27589921,4463641,57210985,79885729,12177649, %U A351696 147998761,197007889,28761265,336087409,431638801,60980689,691402609,863589385,118901521,1316247361,1607847241 %N A351696 a(n) is the numerator of the squared circumradius of a cyclic quadrilateral with sides n, n+1, n+2, n+3. %H A351696 Wikipedia, <a href="https://en.wikipedia.org/wiki/Cyclic_quadrilateral#Parameshvara's_circumradius_formula">Cyclic quadrilateral</a>, Parameshvara's circumradius formula. %F A351696 a(n) = numerator((2*n^6 + 18*n^5 + 65*n^4 + 120*n^3 + 117*n^2 + 54*n + 9)/(n^4 + 6*n^3 + 11*n^2 + 6*n)). %F A351696 a(n) = 24*A351698(n) + 1. %e A351696 385/96, 3289/480, 1729/160, 53041/3360, 146329/6720, 38665/1344, ... %Y A351696 32*A351697(n) are the corresponding denominators. %Y A351696 Cf. A000332, A345665, A351698. %K A351696 nonn,frac %O A351696 1,1 %A A351696 _Hugo Pfoertner_, Feb 26 2022