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%I #5 May 09 2015 14:33:50
%S 1,4,112,27328,59793664,1176978482176,208499384160514048,
%T 332415572152327399063552,4769800462581107835042193801216,
%U 615972813985000129119033854408817639424,715921467030297180050077834366890661741232914432,7488791411462749472408996555169086045062585935389029040128
%N Product_{k=0..n} (3^(2k+1)+1).
%D J. A. Thas, Old and new results on spreads and ovoids of finite classical polar spaces, pp. 529-544 of A. Barlotti et al., eds., Combinatorics `90, North-Holland 1992.
%t Table[Product[3^(2k+1)+1,{k,0,n}],{n,-1,10}] (* _Harvey P. Dale_, May 09 2015 *)
%K nonn
%O -1,2
%A _N. J. A. Sloane_, Jul 03 2003
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