The triangle K referred to in A038200, read along rows.

Terms

a(0) =1a(1) =-1a(2) =1a(3) =1a(4) =-3a(5) =1a(6) =-1a(7) =7a(8) =-4a(9) =1a(10) =1a(11) =-15a(12) =10a(13) =-5a(14) =1a(15) =-1a(16) =31a(17) =-19a(18) =15a(19) =-6a(20) =1a(21) =1a(22) =-63a(23) =28a(24) =-35a(25) =21a(26) =-7a(27) =1a(28) =-1a(29) =127