Numbers k such that k!4 + 2^5 is prime, where k!4 = k!!!! is the quadruple factorial number (A007662).
A291345
Numbers k such that k!4 + 2^5 is prime, where k!4 = k!!!! is the quadruple factorial number (A007662).
Terms
- a(0) =5a(1) =7a(2) =11a(3) =13a(4) =19a(5) =21a(6) =25a(7) =27a(8) =35a(9) =37a(10) =51a(11) =55a(12) =65a(13) =71a(14) =105a(15) =107a(16) =129a(17) =223a(18) =229a(19) =273a(20) =307a(21) =337a(22) =345a(23) =479a(24) =509a(25) =517a(26) =519a(27) =921a(28) =963a(29) =993
External references
- oeis: A291345