A112230 Sequence of Chen primes of the form (x*n+1)*(y*n+1)-2 in the order generated by A112229.

13, 13, 89, 83, 449, 89, 5711, 1511, 701, 449, 8117, 479, 27611, 5711, 1889, 10079, 241739, 701, 145349, 4139, 14489, 8117, 28151, 7079, 25349, 27611, 29537, 5711, 85607, 1889, 212411, 18719, 13331, 241739, 19949, 2699, 220667, 145349, 12401

Offset

1,1

Links

Table of n, a(n) for n=1..39.

Formula

a(n) = (A112229(n,1)*n+1)*(A112229(n,2)*n+1)-2.

Example

For n=3 2*3+1=7 prime, 4*3+1=13 prime, 7*13-2=89 a Chen prime

Crossrefs

Cf. A112229.

Sequence in context: A071612 A059796 A214468 * A121932 A154706 A294077

Adjacent sequences: A112227 A112228 A112229 * A112231 A112232 A112233

Keyword

nonn

Author

Pierre CAMI, Aug 29 2005

Status

approved