OFFSET
2,2
COMMENTS
It appears that row(2^m) is empty for m>=1.
LINKS
Trevor Hyde, Cyclotomic factors of necklace polynomials, arXiv:1811.08601 [math.CO], 2018.
EXAMPLE
Triangle begins:
[0]
[2]
[0]
[2, 4]
[1]
[2, 3, 6]
[0]
[2, 6]
[1, 4]
[2, 5, 10]
[1, 2]
...
PROG
(PARI) row(n) = my(list=List(), pol=polcyclo(n)-1); for (k=1, n, if (type(pol/polcyclo(k)) == "t_POL", listput(list, k))); if (#list, Vec(list), [0]);
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Michel Marcus, Aug 24 2021
STATUS
approved