|
| |
|
|
A100486
|
|
a(n) = pi(n) + prime(n).
|
|
4
|
|
|
|
2, 4, 7, 9, 14, 16, 21, 23, 27, 33, 36, 42, 47, 49, 53, 59, 66, 68, 75, 79, 81, 87, 92, 98, 106, 110, 112, 116, 119, 123, 138, 142, 148, 150, 160, 162, 169, 175, 179, 185, 192, 194, 205, 207, 211, 213, 226, 238, 242, 244, 248, 254, 257, 267, 273, 279, 285, 287
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
LINKS
|
Indranil Ghosh, Table of n, a(n) for n = 1..10410
|
|
|
FORMULA
|
a(n) = A000720(n) + A000040(n). - Wesley Ivan Hurt, Jan 28 2014
|
|
|
EXAMPLE
|
a(21) = pi(21) + prime(21) = 8 + 73 = 81.
|
|
|
MAPLE
|
with(numtheory); A100486:=n->pi(n) + ithprime(n); seq(A100486(n), n=1..60); # Wesley Ivan Hurt, Jan 28 2014
|
|
|
MATHEMATICA
|
Table[PrimePi[n] + Prime[n], {n, 60}]
|
|
|
PROG
|
(PARI) a(n) = primepi(n) + prime(n); \\ Michel Marcus, Feb 24 2023
|
|
|
CROSSREFS
|
Cf. A000040, A000720, A065042, A100917.
Sequence in context: A014817 A326502 A090893 * A139533 A227116 A180742
Adjacent sequences: A100483 A100484 A100485 * A100487 A100488 A100489
|
|
|
KEYWORD
|
easy,nonn
|
|
|
AUTHOR
|
Jonathan Vos Post, Nov 22 2004
|
|
|
STATUS
|
approved
|
| |
|
|
