a(n) is the smallest even number k such that k-1 and k+1 are both n-almost primes.
A335667
a(n) is the smallest even number k such that k-1 and k+1 are both n-almost primes.
Terms
- a(0) =4a(1) =34a(2) =274a(3) =2276a(4) =8126a(5) =184876a(6) =446876a(7) =18671876a(8) =95234374a(9) =1144976876a(10) =6018359374a(11) =281025390626
External references
- oeis: A335667