First differences of A154570.

Terms

a(0) =2a(1) =-7a(2) =6a(3) =-8a(4) =4a(5) =-12a(6) =-4a(7) =-28a(8) =-36a(9) =-92a(10) =-164a(11) =-348a(12) =-676a(13) =-1372a(14) =-2724a(15) =-5468a(16) =-10916a(17) =-21852a(18) =-43684a(19) =-87388a(20) =-174756a(21) =-349532a(22) =-699044a(23) =-1398108a(24) =-2796196a(25) =-5592412a(26) =-11184804a(27) =-22369628a(28) =-44739236a(29) =-89478492