id:A133707 - OEIS Search Results

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Denominator of a remarkable product.

+0
2

1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 5, 5, 1, 5, 5, 5, 1, 1, 5, 5, 1, 1, 1, 5, 1, 1, 1, 1, 5, 5, 5, 5, 5, 25, 25, 25 (list; graph; listen)

	OFFSET	`1,76`
	COMMENT	`There seems to be no other denominators than 1 or 5^k.` `The first 5^k terms appear respectively at positions {76,101,1351,4476,7601,...}`
	LINKS	`Olivier Gerard, Table of n, a(n) for n = 1..10001`
	FORMULA	`a(n) = Product( (394-225 i+85 i^2 -15 i^3+i^4)/120, i=1..n-1 )`
	CROSSREFS	`Sequence of numerators is in A133706.` `Sequence in context: A021647 A094851 A054245 this_sequence A083945 A125563 A093704` `Adjacent sequences: A133704 A133705 A133706 this_sequence A133708 A133709 A133710`
	KEYWORD	`nonn,frac`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com), Sep 20, 2007`

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Last modified December 4 20:00 EST 2008. Contains 151309 sequences.

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