|
|
A138130
|
|
Powers of 1729, the Hardy-Ramanujan number.
|
|
1
|
|
|
1, 1729, 2989441, 5168743489, 8936757492481, 15451653704499649, 26715909255079893121, 46191807102033135206209, 79865634479415290771535361, 138087682014909037743984639169, 238753602203777726259349441123201, 412804978210331688702415183702014529
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
COMMENTS
|
About 1729: "No," said Ramanujan, "It is a very interesting number..."
|
|
REFERENCES
|
David Wells, The Penguin Dictionary of Curious and Interesting Numbers. Penguin Books, NY, 1997, 153.
|
|
LINKS
|
|
|
FORMULA
|
a(n) = 1729^n.
a(n) = 1729*a(n-1) for n > 0.
G.f.: 1/(1 - 1729*x). (End)
|
|
MATHEMATICA
|
|
|
PROG
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|