A134202 Number of rigid Hv-groups of order n.

1, 5, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14

Offset: 1

Author

Roman Bayon (roman.bayon(AT)gmail.com), Oct 14 2007

Keywords

• nonn

References

• R. Bayon and N. Lygeros, Hyperstructures and Automorphism Groups, submitted.
• Th. Vougiouklis, The fundamental relation in hyperrings: The general hyperfield, Fourth Int. Congress Algebraic Hyperstructures and Appl. (AHA), 1991, pp. 203-211.

Links

• Index entries for linear recurrences with constant coefficients, signature (1).

Crossrefs

Cf. A108089, A132590, A134201.

Programs

Mathematica

PadRight[{1,5,13},120,{14}] (* Harvey P. Dale, Aug 22 2019 *)

Formula

a(1)=1, a(2)=5, a(3)=13, a(n)=14 for n>3.

G.f.: -x*(1+4*x+8*x^2+x^3)/(-1+x). - R. J. Mathar, Nov 14 2007