id:A051190 - OEIS Search Results

Search: id:A051190

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Product of n's GCD's with all of its predecessors (from 1 to n-1).

+0
2

1, 1, 1, 2, 1, 12, 1, 16, 9, 80, 1, 3456, 1, 448, 2025, 2048, 1, 186624, 1, 1024000, 35721, 11264, 1, 573308928, 625, 53248, 59049, 179830784, 1, 1007769600000, 1, 67108864, 7144929, 1114112, 37515625, 160489808068608, 1, 4980736, 89813529 (list; graph; listen)

	OFFSET	`1,4`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..200`
	MAPLE	`A051190 := proc(n) local i; product(igcd(n, 'i'), 'i'=1..(n-1)); end;`
	CROSSREFS	`Cf. A006579.` `Sequence in context: A161150 A163088 A105608 this_sequence A072512 A118588 A058734` `Adjacent sequences: A051187 A051188 A051189 this_sequence A051191 A051192 A051193`
	KEYWORD	`nonn,nice`
	AUTHOR	`Antti Karttunen Oct 21 1999`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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