A258339 PrimePi(A258337(n)).

5, 1, 2, 13, 3, 18, 4, 23, 25, 26, 30, 31, 6, 35, 36, 38, 7, 42, 8, 304, 47, 48, 9, 53, 54, 56, 58, 60, 10, 63, 11, 453, 67, 69, 71, 73, 12, 76, 78, 79, 81, 82, 14, 86, 88, 89, 15, 93, 94, 96, 682, 98, 16, 100, 102, 103, 105, 107, 17, 110, 112, 807, 115, 116, 119, 121, 19, 124, 125, 126, 20, 129, 21, 132, 133, 135, 137, 138, 22, 140, 141, 142, 146, 1052, 147, 150

Offset

1,1

Comments

The sequence is a permutation of the positive numbers.

Links

Peter J. C. Moses, Table of n, a(n) for n = 1..5000

Formula

a(n) >= PrimePi(n).

Crossrefs

Cf. A000720, A258337.

Sequence in context: A289690 A088781 A085608 * A197080 A317823 A318430

Adjacent sequences: A258336 A258337 A258338 * A258340 A258341 A258342

Keyword

nonn,base

Author

Vladimir Shevelev, May 27 2015

Status

approved