A226249 - OEIS

%I #8 Jul 17 2025 17:17:42

%S 2,3,5,7,9,10,12,13,15,17,18,20,22,24,25,27,29,31,32,34,35,37,39,41,

%T 42,44,45,47,49,50,52,54,56,57,59,60,62,64,65,67,69,71,72,74,76,78,79,

%U 81,82,84,86,87,89,91,93,94,96,98,100,101,103,104,106,108

%N Positions of nonpositive numbers in the ordering of the rational numbers at A226247.

%C The rational numbers are ordered as a sequence S'' described at A226247.

%H Clark Kimberling, <a href="/A226249/b226249.txt">Table of n, a(n) for n = 1..350</a>

%F a(n) = A005374(n) + n. - _Alan Michael Gómez Calderón_, Jul 16 2025

%e The positions 1,2,3,5,6,8,9,11,12,... are read from this ordering:

%e 0/1, 1/1, 2/1, -1/1, 3, -1/2, 4/1, -1/3, 1/2, 5, -1/4, 2/3, 3/2, -2, ...

%t (See A226247.)

%Y Cf. A005374, A226247.

%K nonn,easy

%O 1,1

%A _Clark Kimberling_, Jun 01 2013