a(0) = 0; thereafter a(n) is the lexicographically earliest missing nonnegative integer such that the digits in the sequence (ignoring the commas) alternate in parity.
A377919
a(0) = 0; thereafter a(n) is the lexicographically earliest missing nonnegative integer such that the digits in the sequence (ignoring the commas) alternate in parity.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =10a(4) =101a(5) =21a(6) =210a(7) =1010a(8) =10101a(9) =2101a(10) =21010a(11) =101010a(12) =1010101a(13) =210101a(14) =2101010a(15) =10101010a(16) =101010101a(17) =21010101a(18) =210101010a(19) =1010101010a(20) =10101010101a(21) =2101010101a(22) =21010101010a(23) =101010101010a(25) =210101010101
External references
- oeis: A377919