like fibonacci starts with 0 and 1 : 0,1,1,2,3,5,8,13,21..... Now start with say 5 and 6 : 5,6,11,17,28,45,73... try using google to convert 11 miles to km (it only starts giving answer from 3rd term)
@HrishabhNayal I have a whole stack of sticky notes with ideas about programs to make but I'm too damn lazy to implement even a single one of those T-T