a(1) = 1; a(n) = smallest positive unpicked integer such that n-k divides evenly into a(n)*a(k) for every k, 1 <= k <= n-1.

A091861

a(1) = 1; a(n) = smallest positive unpicked integer such that n-k divides evenly into a(n)*a(k) for every k, 1 <= k <= n-1.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =3a(4) =12a(5) =30a(6) =60a(7) =420a(8) =840a(9) =1260a(10) =630a(11) =27720a(12) =4620a(13) =60060a(14) =30030a(15) =120120a(16) =240240a(17) =2042040a(18) =3063060a(19) =232792560a(20) =58198140a(21) =38798760a(22) =19399380a(23) =446185740a(24) =892371480a(25) =2230928700a(26) =4461857400a(27) =40156716600a(28) =20078358300a(29) =582272390700

External references