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%I #10 Mar 09 2018 12:13:45
%S 5,28,97,1025,4160,18571,390626,1953637,9824674,53022429,2176782337,
%T 13060702208,78368947065,471258726400,2973697798081,232630513987208,
%U 1628413598172593,11398896347634610,79793365809239777,559022701241487132,4041442752425255185
%N a(n) is the (n-1)st smallest number that is the sum of 2 distinct positive n-th powers.
%e Sums of 2 distinct k-th powers:
%e k=2: 5, 10, 13, 17, 20, 25, 26, ...
%e k=3: 9, 28, 35, 65, 72, 91, 126, ...
%e k=4: 17, 82, 97, 257, 272, 337, 626, ...
%e k=5: 33, 244, 275, 1025, 1056, 1267, 3126, ...
%e k=6: 65, 730, 793, 4097, 4160, 4825, 15626, ...
%e k=7: 129, 2188, 2315, 16385, 16512, 18571, 78126, ...
%e k=8: 257, 6562, 6817, 65537, 65792, 72097, 390626, ...
%e [edited by _Jon E. Schoenfield_, Mar 07 2018]
%Y Cf. A004431, A024670, A088687. - _Michel Marcus_, Mar 07 2018
%K nonn
%O 2,1
%A _Cino Hilliard_, Nov 23 2003
%E Edited Name and more terms from _Jon E. Schoenfield_, Mar 04 2018
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