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 A062872 #7 Jun 19 2024 15:38:59 %S A062872 1,1,3,13,78,612,5796,64426,822470,11856945,190494094,3374719084, %T A062872 65351559893,1373320643023,31124359701926,756718320351009, %U A062872 19645797269948963,542437979097898912,15871685747774947593,490576250611060132721,15972108990755818357442 %N A062872 Nearest integer to geometric mean of n! and n^n. %t A062872 Round[Sqrt[n!*n^n]] (there is no form text zone for Mathematica code) %o A062872 (Python) %o A062872 from math import isqrt, factorial %o A062872 def A062872(n): return isqrt(factorial(n)*n**n<<2)+1>>1 # _Chai Wah Wu_, Jun 19 2024 %Y A062872 Cf. A062871. %K A062872 easy,nonn %O A062872 0,3 %A A062872 _Olivier Gérard_, Jun 26 2001