Numbers n such that (!n)/2 is prime, where !n = Sum_{k=0..n-1} k!.
A100614
Numbers n such that (!n)/2 is prime, where !n = Sum_{k=0..n-1} k!.
Terms
- a(0) =3a(1) =4a(2) =5a(3) =8a(4) =9a(5) =10a(6) =11a(7) =30a(8) =76a(9) =163a(10) =271a(11) =273a(12) =354a(13) =721a(14) =1796a(15) =3733a(16) =4769a(17) =9316a(18) =12221a(19) =41532
External references
- oeis: A100614