a(n) = (10*n + 8)^4.

Terms

a(0) =4096a(1) =104976a(2) =614656a(3) =2085136a(4) =5308416a(5) =11316496a(6) =21381376a(7) =37015056a(8) =59969536a(9) =92236816a(10) =136048896a(11) =193877776a(12) =268435456a(13) =362673936a(14) =479785216a(15) =623201296a(16) =796594176a(17) =1003875856a(18) =1249198336a(19) =1536953616a(20) =1871773696a(21) =2258530576a(22) =2702336256a(23) =3208542736a(24) =3782742016a(25) =4430766096