Concatenate the positions of digits 9, 8,..., 0 in the decimal representation of n, using 1 for the leftmost digit etc., and 0 when the digit does not occur.
A260522
Concatenate the positions of digits 9, 8,..., 0 in the decimal representation of n, using 1 for the leftmost 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) =12a(11) =120a(12) =210a(13) =2010a(14) =20010a(15) =200010a(16) =2000010a(17) =20000010a(18) =200000010a(19) =2000000010a(20) =102a(21) =120a(22) =1200a(23) =2100a(24) =20100a(25) =200100a(26) =2000100a(27) =20000100a(28) =200000100a(29) =2000000100
External references
- oeis: A260522