The Fuss-Catalan triangle of order 3, read by rows. Related to quartic trees.

Terms

a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =4a(6) =0a(7) =1a(8) =7a(9) =22a(10) =0a(11) =1a(12) =10a(13) =49a(14) =140a(15) =0a(16) =1a(17) =13a(18) =85a(19) =357a(20) =969a(21) =0a(22) =1a(23) =16a(24) =130a(25) =700a(26) =2695a(27) =7084a(28) =0a(29) =1