A164534 (n-th isolated prime) -(-1)^(n-th isolated prime).

1, 24, 38, 48, 54, 68, 80, 84, 90, 98, 114, 128, 132, 158, 164, 168, 174, 212, 224, 234, 252, 258, 264, 278, 294, 308, 318, 332, 338, 354, 360, 368, 374, 380, 384, 390, 398, 402, 410, 440, 444, 450, 458, 468, 480, 488, 492, 500, 504, 510, 542, 548, 558, 564

Offset

1,2

Comments

Since all primes except the first are odd, this is A007510(n)+1 if n>1.

Links

Table of n, a(n) for n=1..54.

Formula

a(n)=A007510(n)-(-1)^A007510(n).

Example

a(1)=2-(-1)^2=1, a(2)=23-(-1)^23=24.

Crossrefs

Cf. A007510.

Sequence in context: A070740 A175460 A015805 * A047982 A210456 A095158

Adjacent sequences: A164531 A164532 A164533 * A164535 A164536 A164537

Keyword

nonn,less

Author

Juri-Stepan Gerasimov, Aug 15 2009

Extensions

Edited and entries checked by R. J. Mathar, Aug 21 2009

Status

approved