Numbers k such that k^2 is sum of two positive 7th powers.

Terms

a(0) =16a(1) =2048a(2) =34992a(3) =262144a(4) =1250000a(5) =4478976a(6) =13176688a(7) =33554432a(8) =76527504a(9) =160000000a(10) =276922881a(11) =311794736a(12) =573308928a(13) =1003976272a(14) =1686616064a(15) =2733750000a(16) =4294967296a(17) =6565418768a(18) =9795520512a(19) =14301947824a(20) =20480000000a(21) =28817416656a(22) =35446128768a(23) =39909726208