A107818 Slowest increasing sequence where (product of 2 consecutive integers)-1 is prime.

2, 3, 4, 5, 6, 7, 12, 14, 16, 17, 22

Offset

0,1

Comments

Essentially the same as A070916. [From R. J. Mathar, Aug 24 2008]

Links

Table of n, a(n) for n=0..10.

Example

(2*3)-1=5, which is prime; (3*4)-1=11=prime; (4*5)-1=19=prime; (5*6)-1=29=prime, etc.

Crossrefs

Sequence in context: A234841 A353725 A108948 * A039952 A129978 A251556

Adjacent sequences: A107815 A107816 A107817 * A107819 A107820 A107821

Keyword

base,easy,nonn

Author

Eric Angelini, Jun 11 2005

Status

approved