A232207 Arises from color-symmetrized counting of tensor invariants.

1, 1, 2, 4, 5, 13, 29, 48, 114, 301, 579, 1462, 4198, 9295, 24184, 73489, 179879, 488616, 1540939, 4086226, 11540851, 37515163, 106101932, 311122047, 1037973223, 3097496100, 9407708340, 32130072122, 100356356885, 314999307749, 1099302983248, 3571869566808

Offset: 1

Author

N. J. A. Sloane, Nov 21 2013

Keywords

• nonn

Comments

See Geloun-Ramgoolam, Section 5.1 and Appendix B for precise definition and Mathematica code.

Links

• Hiroaki Yamanouchi, Table of n, a(n) for n = 1..60
• J. B. Geloun, S. Ramgoolam, Counting Tensor Model Observables and Branched Covers of the 2-Sphere, arXiv preprint arXiv:1307.6490, 2013
• Geloun, Joseph Ben; Ramgoolam, Sanjaye Tensor models, Kronecker coefficients and permutation centralizer algebras. J. High Energy Phys. 2017, No. 11, Paper No. 92, 75 p. (2017).
• Hiroaki Yamanouchi, Python code

Crossrefs

a(n) * n! gives A239838(n). - Alois P. Heinz, Jul 23 2014

Extensions

a(14)-a(32) from Hiroaki Yamanouchi, Mar 12 2015