a(1) = 6, a(n) = smallest number of the form k*a(n-1) +1 with the same prime signature p*q (6 = 2*3), where p and q are primes.

A085066

a(1) = 6, a(n) = smallest number of the form k*a(n-1) +1 with the same prime signature p*q (6 = 2*3), where p and q are primes.

Terms

    a(0) =6a(1) =55a(2) =111a(3) =334a(4) =335a(5) =671a(6) =1343a(7) =16117a(8) =16118a(9) =64473a(10) =64474a(11) =257897a(12) =2063177a(13) =8252709a(14) =41263546a(15) =123790639a(16) =371371918a(17) =1485487673a(18) =2970975347a(19) =59419506941a(20) =356517041647

External references