A225046 Position of the first occurrence of the n-th prime in A225017, or 0 if prime(n) never occurs.

2, 5, 4, 14, 6, 7, 16, 21, 23, 24, 57, 122, 32, 19, 20, 22, 186, 177, 26, 29, 27, 61, 236, 34, 160, 36, 78, 54, 194, 41, 87, 43, 44, 188, 253, 55, 118, 229, 66, 59, 70, 69, 60, 58, 569, 279, 147, 81, 610, 74, 325, 85, 101, 75, 179, 459, 369, 100, 97, 463, 91

Offset: 4

Author

John W. Layman, Apr 25 2013

Keywords

• nonn

Comments

It appears that a large fraction of terms are relatively small, say a(n)<2*n, but they can be rather large. For example, prime(156)=911 occurs first at n=14424 in A225017, so a(156) = 14424.

Examples

			A225017 begins {1,1,7,1,13,11,...}, with offset 0, and the 4th prime 7 occurs for the first time at A225017(2)=7, so a(4)=2.  11 occurs for the first time at n=5, so a(5)=5.
		

Links

• Alois P. Heinz, Table of n, a(n) for n = 4..240

Crossrefs

Cf. A225017.