Recurrence a(n) = a(n-2) + n^M for M=8, starting with a(0)=0, a(1)=1.

Terms

a(0) =0a(1) =1a(2) =256a(3) =6562a(4) =65792a(5) =397187a(6) =1745408a(7) =6161988a(8) =18522624a(9) =49208709a(10) =118522624a(11) =263567590a(12) =548504320a(13) =1079298311a(14) =2024293376a(15) =3642188936a(16) =6319260672a(17) =10617946377a(18) =17339221248a(19) =27601509418a(20) =42939221248a(21) =65424368779a(22) =97815094784a(23) =143735354060