id:A136005 - OEIS Search Results

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Numbers of the form 2^p - 1, where p is a prime number that is not the sum, minus 1, of a Pythagorean triple.

+0
2

3, 7, 31, 127, 8191, 131071, 524287, 2147483647, 137438953471, 2199023255551, 8796093022207, 9007199254740991, 2305843009213693951, 147573952589676412927, 9444732965739290427391 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`See A136003 for the values of p.`
	FORMULA	`a(n) = 2^A136003(n) - 1.`
	EXAMPLE	`a(3)=31 because A136003(3)=5 and 2^5=32 and 32-1=31.`
	CROSSREFS	`Cf. A000079, A000668, A136002, A136003.` `Adjacent sequences: A136002 A136003 A136004 this_sequence A136006 A136007 A136008` `Sequence in context: A081093 A093535 A057612 this_sequence A088552 A000668 A136007`
	KEYWORD	`nonn`
	AUTHOR	`Omar E. Pol (info(AT)polprimos.com), Dec 17 2007`

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Last modified October 6 12:54 EDT 2008. Contains 144667 sequences.

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