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A164534
(n-th isolated prime) -(-1)^(n-th isolated prime).
0
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.
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
KEYWORD
nonn,less
AUTHOR
EXTENSIONS
Edited and entries checked by R. J. Mathar, Aug 21 2009
STATUS
approved