Largest prime factor of n-th Bell number A000110(n) (or 1 if A000110(n) = 1).

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =5a(5) =13a(6) =29a(7) =877a(8) =23a(9) =53a(10) =4639a(11) =22619a(12) =2423a(13) =27644437a(14) =1800937a(15) =1101959a(16) =43486067a(17) =255755771a(18) =5006399a(19) =222527a(20) =4326209287a(21) =188633a(22) =574631a(23) =13369534669a(25) =171659a(27) =2479031a(29) =3516743833