OFFSET
1,4
LINKS
EXAMPLE
a(0): between the first two prime Lucas numbers (2,3) there are 0 primes.
a(3): between 11 and 29 there are 4 primes (13, 17, 19, 23).
MATHEMATICA
Differences@ PrimePi@ Select[LucasL@ Range[0, 70], PrimeQ] - 1 (* Giovanni Resta, Jul 28 2019 *)
PROG
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Hauke Löffler, Jul 24 2019
EXTENSIONS
a(14)-a(18) from Giovanni Resta, Jul 28 2019
a(19) using Kim Walisch's primecount, from Amiram Eldar, May 14 2023
STATUS
approved