Product of the numbers k in the range 1 <= k <= n such that the proper divisors of k are a subset of the proper divisors of n.
A158977
Product of the numbers k in the range 1 <= k <= n such that the proper divisors of k are a subset of the proper divisors of n.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =30a(5) =720a(6) =210a(7) =6720a(8) =1890a(9) =8400a(10) =2310a(11) =47900160a(12) =30030a(13) =1681680a(14) =4054050a(15) =15375360a(16) =510510a(17) =1984862880a(18) =9699690a(19) =62078016000a(20) =1833241410a(21) =853572720a(22) =223092870a(24) =5577321750a(25) =23201658480a(26) =54211567410
External references
- oeis: A158977