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A178925
Number of n-node simple graphs that are determined by spectrum.
1
1, 2, 4, 11, 32, 146, 934, 10624, 223629, 9444562
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..10.
Eric Weisstein's World of Mathematics,
Determined by Spectrum
CROSSREFS
Cf.
A006608
(simple graphs not determined by spectrum).
Sequence in context:
A123424
A123449
A123404
*
A298445
A294224
A296270
Adjacent sequences:
A178922
A178923
A178924
*
A178926
A178927
A178928
KEYWORD
nonn
,
hard
,
more
AUTHOR
Eric W. Weisstein
, Dec 29 2010
EXTENSIONS
a(10) from
Eric W. Weisstein
, Dec 30 2010
STATUS
approved
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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)