Sum of 4th powers of digits of n.

Terms

a(0) =0a(1) =1a(2) =16a(3) =81a(4) =256a(5) =625a(6) =1296a(7) =2401a(8) =4096a(9) =6561a(10) =1a(11) =2a(12) =17a(13) =82a(14) =257a(15) =626a(16) =1297a(17) =2402a(18) =4097a(19) =6562a(20) =16a(21) =17a(22) =32a(23) =97a(24) =272a(25) =641a(26) =1312a(27) =2417a(28) =4112a(29) =6577