First differences of A175628.

Terms

a(0) =0a(1) =3a(2) =2a(3) =3a(4) =-5a(5) =12a(6) =6a(7) =3a(8) =-22a(9) =33a(10) =10a(11) =3a(12) =-33a(13) =48a(14) =14a(15) =3a(16) =-74a(17) =93a(18) =18a(19) =3a(20) =-85a(21) =108a(22) =22a(23) =3a(24) =-156a(25) =183a(26) =26a(27) =3a(28) =-161a(29) =192