Convolution square of A112274.

Terms

a(0) =0a(1) =0a(2) =1a(3) =-2a(4) =-1a(5) =6a(6) =-3a(7) =-8a(8) =12a(9) =2a(10) =-22a(11) =16a(12) =22a(13) =-42a(14) =2a(15) =58a(16) =-51a(17) =-42a(18) =106a(19) =-20a(20) =-131a(21) =124a(22) =84a(23) =-232a(24) =56a(25) =276a(26) =-271a(27) =-176a(28) =486a(29) =-120