a(n) is the smallest number m >= 2 for which the set of prime factors of m, m-1 and m+1 contains at least the first n primes.
A080611
a(n) is the smallest number m >= 2 for which the set of prime factors of m, m-1 and m+1 contains at least the first n primes.
Terms
- a(0) =2a(1) =2a(2) =4a(3) =6a(4) =21a(5) =155a(6) =441a(7) =2925a(8) =10165a(9) =342056a(10) =2781505a(11) =10631544a(12) =163886800a(13) =498936010a(14) =5163068911a(15) =794010643700
External references
- oeis: A080611