a(1) = 1 and for any n > 1, if A330647(n) divides a(n-1) then a(n) = a(n-1) / A330647(n), otherwise a(n) = a(n-1) * A330647(n).

A330648

a(1) = 1 and for any n > 1, if A330647(n) divides a(n-1) then a(n) = a(n-1) / A330647(n), otherwise a(n) = a(n-1) * A330647(n).

Terms

    a(0) =1a(1) =2a(2) =6a(3) =30a(4) =5a(5) =20a(6) =140a(7) =1260a(8) =126a(9) =1386a(10) =18018a(11) =1287a(12) =10296a(13) =858a(14) =14586a(15) =277134a(16) =12597a(17) =201552a(18) =4635696a(19) =193154a(20) =2897310a(21) =111435a(22) =3120180a(23) =156009a(24) =7429a(25) =133722a(26) =3343050a(27) =96948450a(28) =3231615a(29) =100180065

External references