id:A076143 - OEIS Search Results

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Number of permutations p(1),...,p(n) of 1,...,n such that GCD( sum{k=1 to m} p(k), p(m+1) ) = 1 for all positive integers m <= n-1.

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1, 2, 2, 8, 32, 80, 376, 1736, 15618, 118732, 412052, 3562696, 81378488 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Leroy Quet, Home Page (listed in lieu of email address)`
	CROSSREFS	`Sequence in context: A003616 A079895 A053047 this_sequence A057132 A121197 A009543` `Adjacent sequences: A076140 A076141 A076142 this_sequence A076144 A076145 A076146`
	KEYWORD	`nonn`
	AUTHOR	`Leroy Quet Oct 31 2002`
	EXTENSIONS	`More terms from Hans Havermann, Nov 01, 2002` `2 more terms from David W. Wilson, Nov 02, 2002`

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.