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A007105 Number of labeled Eulerian 3-regular digraphs with n nodes.
(Formerly M5285)
3
1, 0, 0, 0, 1, 44, 7570, 1975560, 749649145, 399035751464, 289021136349036, 277435664056527360, 345023964977303838105, 545099236551025860229460, 1075595203804151695555622446 (list; graph; refs; listen; history; text; internal format)
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
O. Gonzalez, C. Beltran and I. Santamaria, 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
CROSSREFS
Sequence in context: A203974 A266853 A323315 * A180842 A172753 A268425
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified March 29 08:13 EDT 2024. Contains 371265 sequences. (Running on oeis4.)