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A085523 Product_{k=0..n} (4^(2k+1)+1). 0
1, 5, 325, 333125, 5458253125, 1430853765453125, 6001437102708869453125, 402749632331680654432389453125, 432449125237897791207428190509189453125, 7429419400754766057344059513229133345069189453125, 2042183254696046247075864924725939712088925233082669189453125, 8981616938352999804189736540441162599045265812868432152715194669189453125 (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.

CROSSREFS

Sequence in context: A251696 A274306 A053516 * A292687 A152425 A304017

Adjacent sequences:  A085520 A085521 A085522 * A085524 A085525 A085526

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jul 03 2003

STATUS

approved

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Last modified April 22 10:13 EDT 2019. Contains 322330 sequences. (Running on oeis4.)