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Triangle where row n contains the first n positive integers which are coprime to (2^n -1).

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1, 1, 2, 1, 2, 3, 1, 2, 4, 7, 1, 2, 3, 4, 5, 1, 2, 4, 5, 8, 10, 1, 2, 3, 4, 5, 6, 7, 1, 2, 4, 7, 8, 11, 13, 14, 1, 2, 3, 4, 5, 6, 8, 9, 10, 1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1, 2, 4, 8, 11, 16, 17, 19, 22, 23, 29, 31, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 1, 2, 4 (list; table; graph; listen)

	OFFSET	`1,3`
	EXAMPLE	`2^6 -1 = 63. So row 6 is the first 6 positive integers which are coprime to 63: (1,2,4,5,8,10).`
	CROSSREFS	`Cf. A131880, A000225.` `Sequence in context: A059250 A104795 A116925 this_sequence A134628 A064882 A065158` `Adjacent sequences: A131876 A131877 A131878 this_sequence A131880 A131881 A131882`
	KEYWORD	`nonn,tabl`
	AUTHOR	`Leroy Quet (qq-quet(AT)mindspring.com), Jul 23 2007`
	EXTENSIONS	`More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 01 2007`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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