n-th natural number m such that m and m+2 are both divisible by exactly n primes (counted with multiplicity).
A180245
n-th natural number m such that m and m+2 are both divisible by exactly n primes (counted with multiplicity).
Terms
- a(0) =3a(1) =33a(2) =42a(3) =196a(4) =918a(5) =6640a(6) =24750a(7) =246078a(8) =781248a(9) =6565374a(10) =25227774a(11) =165009150a(12) =673932798a(13) =5268548608a(14) =25737162750a(15) =179511912448a(16) =818179991550
External references
- oeis: A180245