A023333 Primes that remain prime through 5 iterations of function f(x) = 2x + 7.
14723, 20123, 54713, 109433, 594653, 604883, 676493, 759953, 847103, 935843, 1035743, 1049603, 1079033, 1099823, 1222253, 1263323, 1499153, 1754033, 1835003, 1893173, 2017283, 2071493, 2099213, 2199653, 2895743, 2998313, 3389693, 4133663
Offset: 1
Keywords
Links
- John Cerkan, Table of n, a(n) for n = 1..10000
Programs
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Magma
[n: n in [1..5000000] | IsPrime(n) and IsPrime(2*n+7) and IsPrime(4*n+21) and IsPrime(8*n+49) and IsPrime(16*n+105) and IsPrime(32*n+217)] // Vincenzo Librandi, Aug 04 2010
Formula
a(n) == 23 (mod 30). - John Cerkan, Oct 10 2016
Comments