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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A031412 Numbers n such that continued fraction for sqrt(n) has even period and central term 9. 0
83, 103, 107, 119, 328, 352, 384, 416, 424, 480, 735, 795, 807, 879, 951, 1011, 1083, 1304, 1432, 1496, 1544, 1688, 1816, 1928, 2035, 2215, 2315, 2335, 2435, 2515, 2535, 2615, 2735, 2815, 2928, 2935, 3015, 3216, 3768, 3792, 3983, 4056 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..42.

CROSSREFS

Sequence in context: A139965 A180523 A139765 * A033252 A096279 A140771

Adjacent sequences:  A031409 A031410 A031411 * A031413 A031414 A031415

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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 May 22 23:20 EDT 2013. Contains 225585 sequences.