Numbers k such that k!4 + 2^9 is prime, where k!4 = k!!!! is the quadruple factorial number (A007662).
A291350
Numbers k such that k!4 + 2^9 is prime, where k!4 = k!!!! is the quadruple factorial number (A007662).
Terms
- a(0) =9a(1) =11a(2) =13a(3) =17a(4) =19a(5) =21a(6) =29a(7) =31a(8) =33a(9) =35a(10) =67a(11) =103a(12) =111a(13) =129a(14) =179a(15) =355a(16) =713a(17) =799a(18) =921a(19) =1013a(20) =1389a(21) =1543a(22) =2097a(23) =2287a(24) =3657a(25) =4115a(26) =7031a(27) =10689a(28) =11715a(29) =16401
External references
- oeis: A291350