Numbers k such that k!4 + 2^6 is prime, where k!4 = k!!!! is the quadruple factorial number (A007662).
A291347
Numbers k such that k!4 + 2^6 is prime, where k!4 = k!!!! is the quadruple factorial number (A007662).
Terms
- a(0) =3a(1) =9a(2) =15a(3) =17a(4) =19a(5) =29a(6) =31a(7) =45a(8) =55a(9) =63a(10) =73a(11) =101a(12) =135a(13) =173a(14) =217a(15) =271a(16) =439a(17) =535a(18) =729a(19) =787a(20) =933a(21) =1473a(22) =1651a(23) =6617a(24) =7805a(25) =12461a(26) =13253a(27) =18627a(28) =20243a(29) =55271
External references
- oeis: A291347