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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A128683 Numbers n such that n^3 divides 10^(n^2)+1. 19
1, 11, 253, 11891, 35167, 45023, 47927, 96569, 276859, 640343, 1035529, 1102321, 1652849, 2221087, 6367757, 16339367, 19588019, 26499979, 30096121, 48669863, 51809087, 74901409, 88023001, 89007677, 104391089, 105080767, 143938531 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

11 divides a(n) for n>1.

CROSSREFS

Cf. A127263 = numbers n such that n^3 divide 2^(n^2)+1. Cf. A128677 = Least k>p such that (kp)^3 divides (p-1)^(kp)^2+1, where p = Prime[n]>2. Cf. A128678, A128679, A128680, A128681, A128682, A128684, A128685.

Sequence in context: A012154 A009055 A009067 * A177912 A128405 A052782

Adjacent sequences:  A128680 A128681 A128682 * A128684 A128685 A128686

KEYWORD

hard,nonn

AUTHOR

Alexander Adamchuk (alex(AT)kolmogorov.com), Mar 31 2007

EXTENSIONS

More terms - J. Mulder (jasper.mulder(AT)planet.nl), Jan 26 2010

Terms a(16) onward from Max Alekseyev (maxale(AT)gmail.com) and Alexander Adamchuk (alex(AT)kolmogorov.com), May 12 2010

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 14 07:46 EST 2012. Contains 205597 sequences.