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A085522 Product_{k=0..n} (3^(2k+1)+1). 0
1, 4, 112, 27328, 59793664, 1176978482176, 208499384160514048, 332415572152327399063552, 4769800462581107835042193801216, 615972813985000129119033854408817639424, 715921467030297180050077834366890661741232914432, 7488791411462749472408996555169086045062585935389029040128 (list; graph; refs; listen; history; text; internal format)
OFFSET

-1,2

REFERENCES

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.

LINKS

Table of n, a(n) for n=-1..10.

MATHEMATICA

Table[Product[3^(2k+1)+1, {k, 0, n}], {n, -1, 10}] (* Harvey P. Dale, May 09 2015 *)

CROSSREFS

Sequence in context: A293158 A196458 A262261 * A263416 A078780 A041377

Adjacent sequences:  A085519 A085520 A085521 * A085523 A085524 A085525

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jul 03 2003

STATUS

approved

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Last modified October 20 04:52 EDT 2021. Contains 348099 sequences. (Running on oeis4.)