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 A192037 #10 Mar 30 2012 17:36:33 %S A192037 1,16,96,256,2500,9216,62496,147456,1499904,6250000,39037504,84934656, %T A192037 971882496,3905750016,23437500000,57415827456,610351562496, %U A192037 2249712009216,15258773437504,39062500000000,366140629499904,1523926718550016,9536743164062496,16231265527136256,238418579101562500 %N A192037 Generalized Euler phi function (for p=5). %C A192037 For n>=2 a(n) is the number of n X n circulant invertible matrices over GF(5) %o A192037 (PARI) /* see A003473, there set p=5 */ %Y A192037 Cf. A003473 (p=2), A003474 (p=3). %K A192037 nonn %O A192037 1,2 %A A192037 _Joerg Arndt_, Jul 03 2011