login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A069984 1123+21460n. 0
1123, 22583, 44043, 65503, 86963, 108423, 129883, 151343, 172803, 194263, 215723, 237183, 258643, 280103, 301563, 323023, 344483, 365943, 387403, 408863, 430323, 451783, 473243, 494703, 516163, 537623, 559083, 580543, 602003, 623463 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

COMMENTS

Arises in an important Ramanujan formula for Pi: 4/Pi=1123/882-22583/882^3*(1/2*(1*3)/4^2)+...

REFERENCES

L. Berggren, J. Borwein and P. Borwein, "Pi: A source book", Springer, second edition, p. 328.

S. Ramanujan, "Modular equations and approximations to Pi", Quart. J. Pure Appl. Math., v. 45, 1914, p. 350-372.

LINKS

Tanya Khovanova, Recursive Sequences

CROSSREFS

Sequence in context: A105310 A200072 A125840 * A104285 A203830 A203063

Adjacent sequences:  A069981 A069982 A069983 * A069985 A069986 A069987

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), May 01 2002

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 16 18:43 EST 2012. Contains 205939 sequences.