a(n) is the smallest positive integer k, such that set of pairwise gcd of k, k+1, ..., k+n has a cardinality of n.
A356371
a(n) is the smallest positive integer k, such that set of pairwise gcd of k, k+1, ..., k+n has a cardinality of n.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =8a(4) =15a(5) =24a(6) =35a(7) =48a(8) =63a(9) =270a(10) =440a(11) =528a(12) =780a(13) =1078a(14) =2925a(15) =1440a(16) =8160a(17) =2142a(18) =5472a(19) =34560a(20) =23919a(21) =235598a(22) =64239a(23) =42480a(24) =158400a(25) =1255800a(26) =1614600a(27) =1247400a(28) =16442971a(29) =8233650
External references
- oeis: A356371