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Search: id:A051190
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A051190 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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