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 A099090 #7 Jun 26 2022 02:36:52 %S A099090 1,1,28,42386176,193887869660028067003488010240 %N A099090 a(n) = A004491(n)/2^(2n+1). %C A099090 Normalized count of bent functions - see A004491 for details. %C A099090 The old entry with this sequence number was a duplicate of A099040. %Y A099090 Cf. A004491. %K A099090 nonn %O A099090 0,3 %A A099090 _N. J. A. Sloane_, Sep 23 2008