Numbers k such that k!6 - 4 is prime, where k!6 is the sextuple factorial number (A085158 ).
A289547
Numbers k such that k!6 - 4 is prime, where k!6 is the sextuple factorial number (A085158 ).
Terms
- a(0) =6a(1) =7a(2) =9a(3) =15a(4) =21a(5) =27a(6) =29a(7) =321a(8) =327a(9) =333a(10) =567a(11) =1025a(12) =4263a(13) =4365a(14) =5175a(15) =5655a(16) =9221a(17) =9327a(18) =9681a(19) =19685a(20) =24777a(21) =57869a(22) =58737
External references
- oeis: A289547