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%I #8 Sep 26 2014 21:14:19
%S 2,7,193,19079,1823013184807,324494495853101147203936847,
%T 16085434555484907108254435283952049,
%U 255525859571903290673264616283734506003204622439226993660213169027169
%N Primes in tetranacci sequence A001631.
%C a(9) is too large to display here. It has 160 digits and is the 564th term in A001631.
%t a={0,0,1,0}; For[n=4, n<=1000, n++, sum=Plus@@a; If[PrimeQ[sum], Print[sum]]; a=RotateLeft[a]; a[[4]]=sum]
%Y Cf. A001590, A001631, A100683, A231574, A231575, A232543, A214899, A020992, A233554. A214727, A234696, A141523, A235862,A214825, A235873, A001630, A241660, A247027.
%K nonn
%O 1,1
%A _Robert Price_, Sep 09 2014