OFFSET
1,1
LINKS
Charles R Greathouse IV, Table of n, a(n) for n = 1..10000
EXAMPLE
73 is here because C(73,71) = 2628 = 4*9*73 and C(71,67) = 971635 = 71*23*17*7*5 are relatively prime.
MATHEMATICA
Select[Partition[Prime[Range[200]], 3, 1], GCD[Binomial[#[[3]], #[[2]]], Binomial[#[[2]], #[[1]]]]==1&][[;; , 3]] (* Harvey P. Dale, Feb 26 2023 *)
PROG
(PARI) is(n)=my(p=precprime(n-1), q=precprime(p-1)); gcd(binomial(n, p), binomial(p, q))==1 && isprime(n) && n>4 \\ Charles R Greathouse IV, Nov 13 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Nov 13 2000
EXTENSIONS
Name corrected by Charles R Greathouse IV, Nov 13 2015
STATUS
approved