login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A273987 Smallest Riesel number to base n. 0
509203, 63064644938, 9, 346802, 84687, 408034255082, 14, 4, 10176, 862, 25, 302, 4, 36370321851498, 9, 86, 246, 144, 8, 560, 4461, 476, 4, 36, 149, 8, 144, 4, 1369, 134718, 10, 16, 6, 287860, 4, 7772, 13, 4, 81, 8, 15137, 672, 4, 22564, 8177, 14, 3226, 36, 16 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

a(2), a(3), a(5), a(6), a(7), a(10), a(15), a(22), a(23), a(30), ... are only conjectural (see links).

LINKS

Table of n, a(n) for n=2..50.

Gary Barnes, Riesel conjectures and proofs.

Gary Barnes, Riesel conjectures and proofs, Powers of 2.

Gary Barnes, Condensed table of all conjectures for bases ≤ 1030.

Wikipedia, Riesel number.

CROSSREFS

Cf. A076337, A101036.

Sequence in context: A206430 A182296 A263958 * A250057 A230619 A176655

Adjacent sequences:  A273984 A273985 A273986 * A273988 A273989 A273990

KEYWORD

nonn,hard

AUTHOR

Tim Johannes Ohrtmann, Jun 06 2016

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 16 18:53 EDT 2021. Contains 343050 sequences. (Running on oeis4.)