1,1,2,3,3,9,4,27

The given sequence alternates between two distinct patterns interleaved together:

1. First subsequence (odd positions): Starts at 1 and increases by 1 each time.

Terms: 1, 2, 3, 4, 5, 6, ...

2. Second subsequence (even positions): Starts at 1 and multiplies by 3 each time.

Terms: 1, 3, 9, 27, 81, 243, ...

Full sequence:

1, 1, 2, 3, 3, 9, 4, 27, 5, 81, 6, 243, ...

Next terms: After 27, the sequence continues with 5 (from the first subsequence) and 81 (from the second subsequence).