a(n) is the smallest integer k > 2*n such that Product_{i=1..n} (k - i) has no prime factor p in n < p < 2*n.
A386620
a(n) is the smallest integer k > 2*n such that Product_{i=1..n} (k - i) has no prime factor p in n < p < 2*n.
Terms
- a(0) =3a(1) =6a(2) =9a(3) =20a(4) =13a(5) =21a(6) =21a(7) =22a(8) =65a(9) =220a(10) =51a(11) =338a(12) =133a(13) =321a(14) =339a(15) =340a(16) =113a(17) =114a(18) =368a(19) =550a(20) =805a(21) =2691a(22) =1884a(23) =2664a(24) =7653a(25) =7654a(26) =36887a(27) =36888a(28) =21234a(29) =21235
External references
- oeis: A386620