A333470 - OEIS

%I #7 Mar 23 2020 21:54:01

%S 1,3,2,4,5,6,7,9,8,11,10,13,12,15,14,16,17,18,19,20,21,22,23,24,25,26,

%T 27,28,29,30,31,33,32,35,34,37,36,39,38,41,40,43,42,45,44,47,46,49,48,

%U 51,50,53,52,55,54,57,56,59,58,61,60,63,62,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80

%N Lexicographically earliest sequence of distinct positive terms such that a(n) is the number of commas that a(n) has to step over (to the right) to be met by an odd term. This odd term might not be the closest odd term to a(n).

%e a(1) = 1 steps over 1 comma to be met by the odd term 3;

%e a(2) = 3 steps over 3 commas to be met by the odd term 5;

%e a(3) = 2 steps over 2 commas to be met by the same odd term 5;

%e a(4) = 4 steps over 4 commas to be met by the odd term 9 (the odd term 5 is closer, but this is not the point);

%e a(5) = 5 steps over 5 commas to be met by the odd term 11 (again, the odd terms 7 and 9 are closer, but we don't care); etc.

%K base,nonn

%O 1,2

%A _Eric Angelini_ and _Carole Dubois_, Mar 23 2020