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 A134202 #13 Jun 29 2023 12:33:57
%S A134202 1,5,13,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,
%T A134202 14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,
%U A134202 14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14
%N A134202 Number of rigid Hv-groups of order n.
%D A134202 R. Bayon and N. Lygeros, Hyperstructures and Automorphism Groups, submitted.
%D A134202 Th. Vougiouklis, The fundamental relation in hyperrings: The general hyperfield, Fourth Int. Congress Algebraic Hyperstructures and Appl. (AHA), 1991, pp. 203-211.
%H A134202 <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (1).
%F A134202 a(1)=1, a(2)=5, a(3)=13, a(n)=14 for n>3.
%F A134202 G.f.: -x*(1+4*x+8*x^2+x^3)/(-1+x). - _R. J. Mathar_, Nov 14 2007
%t A134202 PadRight[{1,5,13},120,{14}] (* _Harvey P. Dale_, Aug 22 2019 *)
%Y A134202 Cf. A108089, A132590, A134201.
%K A134202 nonn
%O A134202 1,2
%A A134202 Roman Bayon (roman.bayon(AT)gmail.com), Oct 14 2007