Convolution square of A073592.

Terms

a(0) =1a(1) =-2a(2) =-3a(3) =2a(4) =6a(5) =12a(6) =1a(7) =-10a(8) =-32a(9) =-46a(10) =-24a(11) =18a(12) =96a(13) =168a(14) =213a(15) =124a(16) =-61a(17) =-386a(18) =-734a(19) =-992a(20) =-957a(21) =-386a(22) =685a(23) =2288a(24) =3939a(25) =5158a(26) =5012a(27) =2930a(28) =-1853a(29) =-8888