Increasing sequence obtained by union of two sequences A136354 and {b(n)}, where b(n) is the smallest composite number m such that m+1 is prime and the set of distinct prime factors of m consists of the first n primes.
A136357
Increasing sequence obtained by union of two sequences A136354 and {b(n)}, where b(n) is the smallest composite number m such that m+1 is prime and the set of distinct prime factors of m consists of the first n primes.
Terms
- a(0) =4a(1) =6a(2) =9a(3) =15a(4) =30a(5) =105a(6) =210a(7) =2310a(8) =3465a(9) =15015a(10) =120120a(11) =765765a(12) =4084080a(13) =33948915a(14) =106696590a(15) =334639305a(16) =892371480a(17) =3234846615a(18) =71166625530a(19) =100280245065a(20) =200560490130
External references
- oeis: A136357