a(n) is the smallest integer k > 1 that satisfies k mod j <= 1 for all integers j in 1..n.

Terms

a(0) =2a(1) =2a(2) =3a(3) =4a(4) =16a(5) =25a(6) =36a(7) =120a(8) =505a(9) =721a(10) =2520a(11) =2520a(12) =41041a(13) =83161a(14) =83161a(15) =196560a(16) =524161a(17) =524161a(18) =3160080a(19) =3160080a(20) =3160080a(21) =3160080a(22) =68468401a(23) =68468401a(24) =68468401a(25) =68468401a(26) =4724319601a(27) =4724319601a(28) =26702676000a(29) =26702676000