A086506 a(1) = 2, a(2n) = smallest prime of the type r*a(2n-1) +1, a(2n+1) = smallest prime of the type s*a(2n) -1.

2, 3, 5, 11, 43, 173, 691, 6911, 69109, 1658617, 3317233, 19903399, 39806797, 238840783, 4299134093, 25794804559, 464306482061, 8357516677099, 100290200125187, 2607545203254863, 73011265691136163, 292045062764544653

Offset

1,1

Links

Table of n, a(n) for n=1..22.

Crossrefs

Sequence in context: A276532 A003686 A380027 * A109462 A357305 A000905

Adjacent sequences: A086503 A086504 A086505 * A086507 A086508 A086509

Keyword

nonn

Author

Amarnath Murthy, Jul 29 2003

Extensions

More terms from David Wasserman, Mar 09 2005

Status

approved