Array read by antidiagonals: number of {112,221}-avoiding words.

Terms

a(0) =1a(1) =1a(2) =2a(3) =1a(4) =4a(5) =3a(6) =1a(7) =6a(8) =9a(9) =4a(10) =1a(11) =6a(12) =21a(13) =16a(14) =5a(15) =1a(16) =6a(17) =33a(18) =52a(19) =25a(20) =6a(21) =1a(22) =6a(23) =33a(24) =124a(25) =105a(26) =36a(27) =7a(28) =1a(29) =6