Value of Product[k/sd(k,3),k=1..n], where sd[k,b] is the sum of the digits of k represented in base b.
A109490
Value of Product[k/sd(k,3),k=1..n], where sd[k,b] is the sum of the digits of k represented in base b.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =10a(5) =30a(6) =70a(7) =140a(8) =1260a(9) =6300a(10) =23100a(11) =138600a(12) =600600a(13) =2102100a(14) =10510500a(15) =42042000a(16) =142942800a(17) =1286485200a(18) =8147739600a(19) =40738698000a(20) =285170886000
External references
- oeis: A109490