a(n) = A000594(n+1) - A000594(n).

Terms

a(0) =-25a(1) =276a(2) =-1724a(3) =6302a(4) =-10878a(5) =-10696a(6) =101224a(7) =-198123a(8) =-2277a(9) =650532a(10) =-905556a(11) =-206794a(12) =979594a(13) =815304a(14) =-230024a(15) =-7893070a(16) =9633366a(17) =7933988a(18) =-17771180a(19) =2890272a(20) =-8611200a(21) =31473960a(22) =2645688a(23) =-46788185a(24) =39364937a(25) =-87144792a(26) =97926248a(27) =103759462a(28) =-157618470a(29) =-23631328