login
Indices of odd numbers in A098550.
3

%I #6 Dec 10 2014 17:52:46

%S 1,3,5,7,9,11,13,15,17,19,21,22,23,24,26,28,30,32,34,36,38,40,42,43,

%T 45,47,49,51,53,55,57,59,61,62,64,66,68,70,72,74,76,78,79,81,83,85,87,

%U 88,90,92,94,96,98,100,101,103,105,107,109,111,113,114,116

%N Indices of odd numbers in A098550.

%C A098550(a(n)) mod 2 = 1.

%H Reinhard Zumkeller, <a href="/A251238/b251238.txt">Table of n, a(n) for n = 1..10000</a>

%o (Haskell)

%o a251238 n = a251238_list !! (n-1)

%o a251238_list = filter (odd . a098550) [1..]

%Y Cf. A098550, A005408, A251237, A251239.

%K nonn

%O 1,2

%A _Reinhard Zumkeller_, Dec 02 2014