First differences of A169699.

Terms

a(0) =4a(1) =7a(2) =13a(3) =3a(4) =28a(5) =0a(6) =57a(7) =-53a(8) =60a(9) =0a(10) =120a(11) =-120a(12) =120a(13) =0a(14) =241a(15) =-357a(16) =124a(17) =0a(18) =248a(19) =-248a(20) =248a(21) =0a(22) =496a(23) =-744a(24) =248a(25) =0a(26) =496a(27) =-496a(28) =496a(29) =0