Maybe pause the video and see if you can figure these out? Featuring Neil Sloane of OEIS fame... More links & stuff in full description below, including spoilers ↓↓↓ Extra footage from this video: https://youtu.be/ydn7s9-3GRc Neil Sloane is the founder of the Online Encyclopedia of Integer Sequences: https://oeis.org Some OEIS sequences from this video... http://oeis.org/A249572 (holey numbers) http://oeis.org/A087409 (sixers) http://oeis.org/A002904 (think like a Roman) http://oeis.org/A006933 (Eban) http://oeis.org/A006567 (Emirps) Lunar Arithmetic: https://youtu.be/cZkGeR9CWbk Sloane's gap: https://youtu.be/_YysNM2JoFo Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science. https://www.simonsfoundation.org/outreach/science-sandbox/ And support from Math For America - https://www.mathforamerica.org/ NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Videos by Brady Haran Patreon: http://www.patreon.com/numberphile Numberphile T-Shirts: https://teespring.com/stores/numberphile Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: http://www.bradyharanblog.com/ Sign up for (occasional) emails: http://eepurl.com/YdjL9 Correction: The first table at 1.06 reads n a(n) 1 1 2 4 3 8 4 48 but it should be 0 1 1 4 2 8 3 48 Thanks Patrons: Arjun Chakroborty Jeff Straathof Susan Silver Yana Chernobilsky Christian Cooper Ken Baron Bill Shillito Ben Turner Lehmbecker Bernd Sing Dr Jubal John Tom Buckingham Andrei M Burke Adam Savage James Bissonette john buchan Joshua Davis Steve Crutchfield Jon Padden Valentin-Eugen Dobrota D Hills Eric Mumford Charles Southerland Arnas Ian George Walker Tracy Parry George Greene Igor Sokolov Alfred Wallace Bodhisattva Debnath