A031547 - OEIS

%I #12 Jul 06 2024 16:04:13

%S 2403,2411,2423,2427,2447,2459,2467,2471,2503,2531,2539,2543,2547,

%T 2551,2563,2571,2579,2591,2599,9608,9696,9704,9728,9760,9824,9832,

%U 9856,9888,9896,9920,9928,9984,10016,10048,10080,10088,10144,10208,10216,10240

%N Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 49.

%K nonn

%O 1,1

%A _David W. Wilson_