A050739 Numbers of form 9^k (values of k see A050730) containing no pair of consecutive equal digits (probably finite).
1, 9, 81, 729, 6561, 59049, 4782969, 43046721, 387420489, 31381059609, 282429536481, 2541865828329, 109418989131512359209, 30903154382632612361920641803529
Offset: 0