Scaled triangle A067327.

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =4a(5) =1a(6) =28a(7) =28a(8) =8a(9) =1a(10) =256a(11) =256a(12) =76a(13) =12a(14) =1a(15) =2704a(16) =2704a(17) =816a(18) =140a(19) =16a(20) =1a(21) =31168a(22) =31168a(23) =9488a(24) =1696a(25) =220a(26) =20a(27) =1a(28) =380608a(29) =380608