A354465 Number of connected simple graphs for which D.x = 1 has no solutions when D is the distance matrix.

1, 0, 0, 0, 0, 0, 2, 14, 398, 23923

Offset

1,7

Links

Table of n, a(n) for n=1..10.

Stefan Steinerberger, The first eigenvector of a distance matrix is nearly constant, arXiv:2205.15920 [math.FA], 2022.

Stefan Steinerberger, Curvature on graphs via equilibrium measures, arXiv:2202.01658 [math.CO], 2022; J. Graph Theory (2023), 1-22.

Eric Weisstein's World of Mathematics, Distance Matrix

Crossrefs

Sequence in context: A228852 A242876 A102596 * A050561 A346082 A135865

Adjacent sequences: A354462 A354463 A354464 * A354466 A354467 A354468

Keyword

nonn,more

Author

Eric W. Weisstein, Jun 01 2022

Status

approved