a(1)=1 and for n>1, a(n) is the smallest multiple of a(n-1) which has no nonzero digit in common with a(n-1).
A079838
a(1)=1 and for n>1, a(n) is the smallest multiple of a(n-1) which has no nonzero digit in common with a(n-1).
Terms
- a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =32a(6) =64a(7) =128a(8) =640a(9) =1280a(10) =6400a(11) =12800a(12) =64000a(13) =128000a(14) =640000a(15) =1280000a(16) =6400000a(17) =12800000a(18) =64000000a(19) =128000000a(20) =640000000a(21) =1280000000a(22) =6400000000a(23) =12800000000a(24) =64000000000a(25) =128000000000a(26) =640000000000
External references
- oeis: A079838