login
A277062
Number of primes <= n-th Lucas number.
5
1, 0, 2, 2, 4, 5, 7, 10, 15, 21, 30, 46, 66, 98, 146, 218, 329, 500, 757, 1158, 1766, 2716, 4164, 6420, 9907, 15320, 23760, 36878, 57356, 89288, 139283, 217506, 340059, 532321, 834147, 1308186, 2053958, 3227229, 5075229, 7987852, 12581575, 19831014
OFFSET
0,3
LINKS
Amiram Eldar, Table of n, a(n) for n = 0..101 (calculated using Kim Walisch's primecount)
FORMULA
a(n) = A000720(A000032(n)). - Michel Marcus, Jun 10 2024
MAPLE
a:= n-> numtheory[pi]((<<0|1>, <1|1>>^n. <<2, 1>>)[1$2]):
seq(a(n), n=0..35); # Alois P. Heinz, Nov 09 2016
MATHEMATICA
Table[PrimePi[LucasL[n]], {n, 0, 50}]
PROG
(Magma) [#PrimesUpTo(Lucas(n)): n in [0..41]];
CROSSREFS
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Nov 09 2016
STATUS
approved