a(n) = n^6 - a(n-1), a(0)=1.

Terms

a(0) =1a(1) =0a(2) =64a(3) =665a(4) =3431a(5) =12194a(6) =34462a(7) =83187a(8) =178957a(9) =352484a(10) =647516a(11) =1124045a(12) =1861939a(13) =2964870a(14) =4564666a(15) =6825959a(16) =9951257a(17) =14186312a(18) =19825912a(19) =27219969a(20) =36780031a(21) =48986090a(22) =64393814a(23) =83642075a(24) =107460901