|
|
A348461
|
|
Size of largest bipartite biregular Moore graph of diameter 4 and degrees n and n.
|
|
2
|
|
|
|
OFFSET
|
2,1
|
|
COMMENTS
|
a(7) >= 516, a(8) = 800, a(9) = 1170, a(10) = 1640.
|
|
LINKS
|
|
|
FORMULA
|
Empirical observation: For the terms a(2)-a(6) and a(8)-a(10) a(n) = 2*(A027444(n-1) + 1). It is unknown whether this is also valid for n = 7 and n > 10. - Hugo Pfoertner, Oct 31 2021
Is this the same as 2*A053698(n-1)? If not, where is the first place these sequences differ? - Omar E. Pol, Oct 31 2021
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,more
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|