A134441 - OEIS

%I #16 Nov 21 2013 12:49:08

%S 1,9,13,17,21,29,33,37,41,49,53,57,61,69,73,77,81,89,93,97

%N Last two digits of primes of form 4n+1 (A002144), excluding 5. Leading 0's omitted.

%t Select[Union[Mod[#,100]&/@Select[4Range[200]+1,PrimeQ]], #!=5&]  (* _Harvey P. Dale_, Apr 02 2011 *)

%Y Cf. A002144.

%K fini,full,nonn,base

%O 1,2

%A _Lekraj Beedassy_, Jan 19 2008