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a(n) = 2i + 1 where i is the least index such that A039508(i) = A039509(n).
1

%I #9 Dec 19 2015 14:17:23

%S 1,5,13,55,65,175,233,295,355,499,1319,1631,6005,6487

%N a(n) = 2i + 1 where i is the least index such that A039508(i) = A039509(n).

%Y Cf. A039508, A039509, A039511, A039512, A039513, A039514, A039515.

%K nonn,more

%O 0,2

%A _Christian G. Bower_, Feb 15 1999