1,2,3,4,5,6:7{(integers)}:integers|[natural|counting] numbers
-1,2,3,5,8,13:21{(Fibonacci)}:Fibonacci{ seq{ence}| numbers}
-0,1,1,2,4,7,13:24{(Tribonacci)}:Tribonacci{ seq{ence}| numbers}
+1,2,3,5,8,13:21{(Fibonacci)}:Fibonacci{ seq{uence}| numbers}
+0,1,1,2,4,7,13:24{(Tribonacci)}:Tribonacci{ seq{uence}| numbers}
1,2,4,8,16,32:64{(powers of 2)}:powers of 2|2[**|^]n
1,2,6,24,120,720:5040{(factorials)}:factorials|n!
1,3,5,7,9,11:13{(odd nos.)}:odd [integ|numb]ers