a(n) = sigma(n^5).

Terms

a(0) =1a(1) =63a(2) =364a(3) =2047a(4) =3906a(5) =22932a(6) =19608a(7) =65535a(8) =88573a(9) =246078a(10) =177156a(11) =745108a(12) =402234a(13) =1235304a(14) =1421784a(15) =2097151a(16) =1508598a(17) =5580099a(18) =2613660a(19) =7995582a(20) =7137312a(21) =11160828a(22) =6728904a(23) =23854740a(24) =12207031a(25) =25340742a(26) =21523360a(27) =40137576a(28) =21243690a(29) =89572392