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T(n,k) = number of ordered pairs of integers (x,y) with x^2/n^2 + y^2/k^2 = 1, 1<=k<=n; triangular array, read by rows.

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	OFFSET	`1,1`
	COMMENT	`T(n,k) = number of lattice points on the circumference of an ellipse with semimajor axis = n, semiminor axis = k and center = (0,0).` `a(n) = A088897(n) - A088898(n);` `T(n,n) = A046109(n).`
	LINKS	`Eric Weisstein's World of Mathematics, Ellipse`
	CROSSREFS	`Sequence in context: A010709 A032564 A141248 this_sequence A066014 A080678 A096300` `Adjacent sequences: A088896 A088897 A088898 this_sequence A088900 A088901 A088902`
	KEYWORD	`nonn,tabl`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 21 2003`

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

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