OFFSET
0,6
COMMENTS
Apparently this counts the binary variant (all elements in {0,1}) of A001500 with zero trace. - R. J. Mathar, May 16 2021
REFERENCES
R. W. Robinson, personal communication.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
Óscar González, Carlos Beltrán, and Ignacio Santamaría, On the Number of Interference Alignment Solutions for the K-User MIMO Channel with Constant Coefficients, arXiv preprint arXiv:1301.6196 [cs.IT], 2013-2014. - From N. J. A. Sloane, Feb 19 2013
Jan Tóth and Ondřej Kuželka, Complexity of Weighted First-Order Model Counting in the Two-Variable Fragment with Counting Quantifiers: A Bound to Beat, arXiv:2404.12905 [cs.LO], 2024. See p. 18.
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved