a(n) = A007916(n)^6.

Terms

a(0) =64a(1) =729a(2) =15625a(3) =46656a(4) =117649a(5) =1000000a(6) =1771561a(7) =2985984a(8) =4826809a(9) =7529536a(10) =11390625a(11) =24137569a(12) =34012224a(13) =47045881a(14) =64000000a(15) =85766121a(16) =113379904a(17) =148035889a(18) =191102976a(19) =308915776a(20) =481890304a(21) =594823321a(22) =729000000a(23) =887503681