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

Author

Vladimir Shevelev, May 27 2015

Keywords

• nonn
• base

Comments

The sequence is a permutation of the positive numbers.

Links

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

Crossrefs

Cf. A000720, A258337.

Formula

a(n) >= PrimePi(n).