Numbers k such that k!/(k-2) - 1 is prime.

Terms

a(0) =3a(1) =4a(2) =6a(3) =8a(4) =9a(5) =10a(6) =18a(7) =21a(8) =23a(9) =26a(10) =46a(11) =70a(12) =83a(13) =156a(14) =553a(15) =591a(16) =741a(17) =790a(18) =1430a(19) =2139a(20) =5509a(21) =11429a(22) =11881a(23) =14343