pzagrebin
Christmas Trees
2ndCollatz
5thEmojify
2ndFizz Buzz
2ndJacobi Symbol
2ndKolakoski Sequence
6thLeap Years
4thLook and Say
2ndLucky Numbers
3rdLucky Tickets
2ndNiven Numbers (Long)
5thOrdinal Numbers
3rdPernicious Numbers
10thRoman to Arabic
4thSpelling Numbers
3rdUnited States
2ndVampire Numbers
3rdπ
3rd