Even semiprime equivalent to the Euclid-Mullin sequence: a(1) = 4, a(n) = smallest semiprime divisor of product of previous terms plus 2.
A193689
Even semiprime equivalent to the Euclid-Mullin sequence: a(1) = 4, a(n) = smallest semiprime divisor of product of previous terms plus 2.
Terms
- a(0) =4a(1) =6a(2) =26a(3) =626a(4) =34a(5) =4762a(6) =94a(7) =10a(9) =37219202a(10) =226a(11) =14a(12) =22a(13) =359948158a(14) =141142a(15) =957030986a(16) =82a(17) =926a(18) =46a(19) =38a(20) =86a(21) =158a(22) =262a(23) =1126a(25) =4486a(26) =2434a(27) =62a(28) =12398a(29) =2367240322a(30) =2942a(31) =10430585378
External references
- oeis: A193689