OFFSET
1,3
COMMENTS
Is a(n)/n^2 bounded? It seems that 0.2 < a(n)/n^2 <= 1.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Range[0, 1000], !Divisible[Binomial[6*#, #]/(5*# + 1), 6] &] (* Amiram Eldar, Jun 04 2021 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Jan 14 2003
STATUS
approved