A000332(n) = a(n)*(3*a(n) - 1)/2.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =2a(6) =-3a(7) =5a(8) =7a(9) =-9a(10) =12a(11) =15a(12) =-18a(13) =22a(14) =26a(15) =-30a(16) =35a(17) =40a(18) =-45a(19) =51a(20) =57a(21) =-63a(22) =70a(23) =77a(24) =-84a(25) =92a(26) =100a(27) =-108a(28) =117a(29) =126