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, p. 153.
LINKS
Wikipedia, 1729 (number).
Index entries for linear recurrences with constant coefficients, signature (1729).
FORMULA
a(n) = 1729^n.
From Chai Wah Wu, Jan 19 2021: (Start)
a(n) = 1729*a(n-1) for n > 0.
G.f.: 1/(1 - 1729*x). (End)
From Elmo R. Oliveira, Jun 23 2025: (Start)
E.g.f.: exp(1729*x).
MATHEMATICA
1729^Range[0, 9] (* Alonso del Arte, Oct 18 2014 *)
PROG
(PARI) a(n)=1729^n \\ Charles R Greathouse IV, Jan 20 2014
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Omar E. Pol, Mar 09 2008
STATUS
approved