Similar to the "Look and Say" sequence, with the added requirement that every third digit describes the location of a digit in blocks of three in the previous term.

A349951

Similar to the "Look and Say" sequence, with the added requirement that every third digit describes the location of a digit in blocks of three in the previous term.

Terms

    a(0) =1a(1) =111a(2) =311a(3) =131211

External references