Column 3 of Inverse partition triangle A038498.

Terms

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