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A118011
Complement of the Connell sequence (A001614), where a(n) = 4*n - A001614(n).
a(n) is the position of the second appearance of n in A117384, where A117384(m) = A117384(k) and k = 4*A117384(m) - m. The Connell sequence (A001614) is generated as: 1 odd, 2 even, 3 odd, ...