Concatenate the positions of digits 9, 8,..., 0 in the decimal representation of n, using 1 for the rightmost digit etc., and 0 when the digit does not occur.
A260521
Concatenate the positions of digits 9, 8,..., 0 in the decimal representation of n, using 1 for the rightmost digit etc., and 0 when the digit does not occur.
Terms
- a(0) =1a(1) =10a(2) =100a(3) =1000a(4) =10000a(5) =100000a(6) =1000000a(7) =10000000a(8) =100000000a(9) =1000000000a(10) =21a(11) =120a(12) =120a(13) =1020a(14) =10020a(15) =100020a(16) =1000020a(17) =10000020a(18) =100000020a(19) =1000000020a(20) =201a(21) =210a(22) =1200a(23) =1200a(24) =10200a(25) =100200a(26) =1000200a(27) =10000200a(28) =100000200a(29) =1000000200
External references
- oeis: A260521