A210581 Bras-Amorós number f_n for numerical semigroups of genus n.

1, 2, 7, 23, 68, 200, 615, 1764, 5060, 14626, 41785, 117573, 332475, 933891, 2609832, 7278512

Offset: 0

Author

Jonathan Vos Post, Mar 22 2012

Keywords

• nonn
• hard
• more

Links

• M. Bernardini, Fernando Torres, Counting numerical semigroups by genus and even gaps, arXiv:1612.01212 [math.CO], 2016-2017; Discrete Mathematics 340.12 (2017): 2853-2863.
• Maria Bras-Amorós, Ordinarization Transform of a Numerical Semigroup and Semigroups with a Large Number of Intervals, arXiv:1203.5000 [math.NT], 2012. See Table on p. 11.

Crossrefs

Cf. A007323, A124506.

Extensions

a(15) from Maria Bras-Amorós, Mar 23 2021