Numbers k such that the smoothly undulating palindromic number (4*10^k-7)/33 = 121...21 is a prime (or PRP).
A062209
Numbers k such that the smoothly undulating palindromic number (4*10^k-7)/33 = 121...21 is a prime (or PRP).
Terms
- a(0) =7a(1) =11a(2) =43a(3) =139a(4) =627a(5) =1399a(6) =1597a(7) =1979a(8) =7809a(9) =14059a(10) =46499
External references
- oeis: A062209