Triangle by rows relating to the Rao Uppulari-Carpenter sequence A000587.

Terms

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