First differences of A137776.

Terms

a(0) =0a(1) =1a(2) =0a(3) =1a(4) =0a(5) =1a(6) =1a(7) =0a(8) =4a(9) =-2a(10) =10a(11) =-4a(12) =20a(13) =-4a(14) =36a(15) =0a(16) =64a(17) =8a(18) =120a(19) =16a(20) =240a(21) =16a(22) =496a(23) =0a(24) =1024a(25) =-32a(26) =2080a(27) =-64a(28) =4160a(29) =-64