login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

EKG exceptional numbers: A064413(n) =/= p and A064413(n) <= n - 1.
0

%I #3 Jun 12 2015 08:38:56

%S 16,26,49,77,91,121,169,205,209,289

%N EKG exceptional numbers: A064413(n) =/= p and A064413(n) <= n - 1.

%C Probably complete (David Wasserman).

%e A064413(213)= 209 = 11*19 and 209 < 213 - 1.

%Y Cf. A064413

%K nonn

%O 1,1

%A _Thomas Ordowski_, Jan 24 2009