a(n) = J_4(n)/240.

Terms

a(0) =5a(1) =10a(2) =16a(3) =27a(4) =39a(5) =61a(6) =80a(7) =119a(8) =150a(9) =208a(10) =256a(11) =348a(12) =405a(13) =543a(14) =624a(15) =800a(16) =915a(17) =1166a(18) =1280a(19) =1625a(20) =1785a(21) =2187a(22) =2400a(23) =2947a(24) =3120a(25) =3848a(26) =4096a(27) =4880a(28) =5220a(29) =6240