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%I #23 Jun 11 2020 03:22:41
%S 1,2,3,5,8,4,6,7,13,20,9,29,38,10,11,21,32,12,14,15,29,44,16,17,33,50,
%T 18,19,37,56,22,23,45,68,24,25,49,74,26,27,53,80,28,30,31,61,92,34,35,
%U 69,104,36,39,75,114,40,41,81,122,42,43,85,128,46,47,93,140,48,51,99,150,52,54,55,109,164
%N a(1) = 1, a(2) = 2. For n>2, if a(n-1) is odd, a(n) = a(n-1) + a(n-2), and otherwise a(n) is the smallest missing number.
%C How many times does each number appear?
%e a(10) is even, so a(11) is the least number yet to appear, which is 9.
%Y Cf. A069202, A307023.
%K nonn,easy
%O 1,2
%A _Andrew Slattery_, Jun 08 2020
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