31
18 3 +1 4 +2 6 +3 9 +4 13 +5 18 +6 24 +7 31 +8 39 +9 48 +10 58...
35
The next number in the sequence is 18. It's +1, +2, +3, +4, ....
3. It is the number of letters in the names of positive integers in English.
18
18. 3+1=4, 4+2=6, 6+3=9, 9+4=13, 13+5=18.
31
14
18 3 +1 4 +2 6 +3 9 +4 13 +5 18 +6 24 +7 31 +8 39 +9 48 +10 58...
24 + 1 + 3 + 6 then repeat so 23 + 1 = 24
11 comes next.
35
22
16.
37, it is 4+1 from the first number and 4+2 from the second number then 4+3 from third so on....
16 (add 3 every time).