Array read by rows: right-hand side of triangle A027907 of trinomial coefficients.

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =2a(5) =1a(6) =7a(7) =6a(8) =3a(9) =1a(10) =19a(11) =16a(12) =10a(13) =4a(14) =1a(15) =51a(16) =45a(17) =30a(18) =15a(19) =5a(20) =1a(21) =141a(22) =126a(23) =90a(24) =50a(25) =21a(26) =6a(27) =1a(28) =393a(29) =357