login
Indices of squarefree Pell numbers.
2

%I #11 Feb 25 2024 01:44:29

%S 1,2,3,5,6,9,10,11,13,17,18,19,22,23,25,26,27,29,31,33,34,37,38,39,41,

%T 43,46,47,50,51,53,54,55,57,58,59,61,62,65,66,67,69,71,73,74,78,79,81,

%U 82,83,85,86,87,89,93,94,95,97,99,101,102,103,106,107,109,110

%N Indices of squarefree Pell numbers.

%C The associated Pell numbers are 1, 2, 5, 29, 70, 985, 2378, 5741, 33461, 1136689, 2744210, 6625109,... - _R. J. Mathar_, Jan 04 2017

%H Amiram Eldar, <a href="/A107040/b107040.txt">Table of n, a(n) for n = 1..374</a>

%F {i: A000129(i) in A005117}. - _R. J. Mathar_, Jan 04 2017

%Y Cf. A000129, A005117, A037918, A107037.

%K nonn

%O 1,2

%A _Paul Barry_, May 09 2005

%E More terms from _Amiram Eldar_, Feb 25 2024