A326928 The number of n X n symmetric real (0,1) matrices whose eigenvalues are all integers.
1, 2, 6, 28, 154, 1174, 11480
Offset: 0
Crossrefs
Cf. A003024.
Extensions
a(0)=1 prepended by Alois P. Heinz, Oct 20 2024
This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
Tingyu Tao has authored 1 sequences.