id:A105605 - OEIS Search Results

Search: id:A105605

Displaying 1-1 of 1 results found.

page 1

Sylvester-Pell cyclotomic numbers.

+0
2

1, 2, 5, 6, 29, 7, 169, 34, 197, 41, 5741, 33, 33461, 239, 1345, 1154, 1136689, 199, 6625109, 1121, 45697, 8119, 225058681, 1153, 45232349, 47321, 7761797, 38081, 44560482149, 961 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Primitive parts of Pell numbers A000129.`
	LINKS	`Eric Weisstein's World of Mathematics, Sylvester Cyclotomic Number.`
	FORMULA	`a(n)=product{k=1..n-1, if(gcd(n, k)=1, (1+sqrt(2))-(1-sqrt(2))exp(2piIk/n), 1)}, I=sqrt(-1)`
	CROSSREFS	`Sequence in context: A128367 A137067 A008555 this_sequence A056441 A055877 A111190` `Adjacent sequences: A105602 A105603 A105604 this_sequence A105606 A105607 A105608`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 15 2005`

page 1

Search completed in 0.002 seconds

Last modified July 26 23:19 EDT 2008. Contains 142293 sequences.

AT&T Labs Research