Davenport-Schinzel numbers of degree n on 4 symbols.

Terms

a(0) =1a(1) =4a(2) =7a(3) =12a(4) =16a(5) =23a(6) =28a(7) =35a(8) =40a(9) =47a(10) =52a(11) =59a(12) =64a(13) =71a(14) =76a(15) =83a(16) =88a(17) =95a(18) =100a(19) =107a(20) =112a(21) =119a(22) =124a(23) =131a(24) =136a(25) =143a(26) =148a(27) =155a(28) =160a(29) =167