Even numbers in the numerators of the 1/3-Pascal triangle (by row).

Terms

a(0) =4a(1) =4a(2) =8a(3) =10a(4) =10a(5) =10a(6) =16a(7) =38a(8) =38a(9) =16a(10) =18a(11) =110a(12) =18a(13) =22a(14) =22a(15) =220a(16) =350a(17) =406a(18) =350a(19) =220a(20) =28a(21) =40a(22) =190a(23) =252a(24) =252a(25) =190a(26) =40a(27) =28a(28) =148a(29) =442