A085925 a(n) is taken to be the smallest positive integer greater than a(n-1) which is consistent with the condition "n is a member of the sequence if and only if a(n) is not prime".

1, 3, 4, 6, 7, 8, 9, 10, 12, 14, 17, 18, 19, 20, 23, 29, 30, 32, 33, 34, 37, 41, 42, 43, 47, 53, 59, 61, 62, 63, 67, 68, 69, 70, 71, 73, 74, 79, 83, 89, 90, 91, 92, 97, 101, 103, 104, 107, 109, 113, 127, 131, 132, 137, 139, 149, 151, 157, 158, 163, 164, 165, 166, 167, 173

Offset

1,2

Links

Table of n, a(n) for n=1..65.

Example

a(4) = 6 because 4 is in the sequence and 6 is the next nonprime after a(3). a(5) = 7 because 5 is not in the sequence and 7 is the next prime after a(4).

Crossrefs

Cf. A079000, A079254.

Sequence in context: A004712 A122409 A039093 * A107907 A080804 A164386

Adjacent sequences: A085922 A085923 A085924 * A085926 A085927 A085928

Keyword

easy,nonn,less

Author

David Wasserman, Aug 16 2003

Status

approved