Column 2 of Inverse partition triangle A038498.

Terms

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