This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A127263 Numbers n such that n^3 divide 2^(n^2)+1. 19
 1, 3, 57, 32547, 9961491, 297381939, 1338104811, 3942759027, 5688011361, 8920514307, 9146532873, 40253706489, 243640690617, 764039295291, 1127102902923, 1556475424971, 2251315404417, 3005607686883, 5222670270483 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS If n belongs to this sequence, then so does (2^(n^2)+1)/n^2. Contribution from Alexander Adamchuk, May 14 2010: (Start) 3 divides a(n) for n>1. 19 divides a(n) for n>2. (End) LINKS CROSSREFS Cf. A006521, A093546, A093665, A136372, A128677. Cf. A128678, A128679, A128680, A128681, A128682, A128683, A128684, A128685, A177813, A177814, A177816, A177817, A177818, A177819, A177820. Sequence in context: A012204 A000281 A086220 * A134723 A133060 A198915 Adjacent sequences:  A127260 A127261 A127262 * A127264 A127265 A127266 KEYWORD nonn AUTHOR Max Alekseyev, Mar 27 2007, Mar 29 2007, Apr 18 2007 EXTENSIONS a(7) from Ryan Propper (rpropper(AT)cs.stanford.edu), Jan 01 2008 a(8)-a(19) from Max Alekseyev, May 14 2010 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 .