Numbers k > 4 such that both k - 2^(2^m) and k + 2^(2^m) are prime for every natural m > 0 with 2^(2^m) < k.
A371303
Numbers k > 4 such that both k - 2^(2^m) and k + 2^(2^m) are prime for every natural m > 0 with 2^(2^m) < k.
Terms
- a(0) =7a(1) =9a(2) =15a(3) =27a(4) =57a(5) =63a(6) =195a(7) =267a(8) =363a(9) =405a(10) =483a(11) =603a(12) =1197a(13) =1233a(14) =1443a(15) =1737a(16) =2715a(17) =4257a(18) =5403a(19) =6117a(20) =21855a(21) =22287a(22) =26817a(23) =40755a(24) =63777a(25) =260007a(26) =617253a(27) =986733a(28) =1151655a(29) =1167837
External references
- oeis: A371303