A054089 - OEIS

%I #11 Mar 29 2024 08:47:36

%S 1,3,2,6,4,8,5,11,7,14,9,16,10,19,12,21,13,24,15,27,17,29,18,32,20,35,

%T 22,37,23,40,25,42,26,45,28,48,30,50,31,53,33,55,34,58,36,61,38,63,39,

%U 66,41,69,43,71,44,74,46,76,47,79,49,82,51

%N For k >= 1, let p(k) = least h in N not already an a(i), q(k) = p(k)+k, a(2k) = q(k), a(2k+1) = p(k).

%Y Cf. A004957 (even-indexed terms), A026351 (odd-indexed terms).

%K nonn

%O 1,2

%A _Clark Kimberling_