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A084444
Primes that can be written as 1+p+p^k, p prime and k>1.
2
7, 11, 13, 19, 31, 67, 131, 307, 631, 733, 1723, 3541, 4099, 4931, 5113, 8011, 10303, 14653, 17293, 19687, 24419, 28057, 30103, 32771, 59053, 65539, 68963, 86143, 147073, 148931, 262147, 357983, 459007, 492103, 552793, 571871, 579883, 598303, 684757, 704761
OFFSET
1,1
COMMENTS
A084440(a(n))>0; subset of A084441.
EXAMPLE
729 = 1+3+3^6.
CROSSREFS
Sequence in context: A059637 A059308 A075521 * A081091 A027901 A129213
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, May 26 2003
EXTENSIONS
More terms from David Wasserman, Dec 29 2004
STATUS
approved