a(n) = Product_{d|n} A019565(A289813(d)); a product obtained from the 1-digits present in ternary expansions of the divisors of n.
A351081
a(n) = Product_{d|n} A019565(A289813(d)); a product obtained from the 1-digits present in ternary expansions of the divisors of n.
Terms
- a(0) =2a(1) =2a(2) =6a(3) =12a(4) =6a(5) =6a(6) =4a(7) =12a(8) =30a(9) =60a(10) =10a(11) =540a(12) =60a(13) =60a(14) =90a(15) =120a(16) =10a(17) =30a(18) =4a(19) =360a(20) =36a(21) =60a(22) =6a(23) =540a(24) =12a(25) =60a(26) =210a(27) =5040a(28) =14a(29) =18900
External references
- oeis: A351081