Cow Problem Answer Development
Years Hence
Number Born
Number 1 year old
Number 2 year old
Number Mature
0
1
0
0
0
1
0
1
0
0
2
0
0
1
0
3
1
0
0
1
4
1
1
0
1
5
1
1
1
1
6
2
1
1
2
7
3
2
1
3
8
4
3
2
4
9
6
4
3
6
10
9
6
4
9
11
13
9
6
13
12
19
13
9
19
13
28
19
13
28
14
41
28
19
41
15
60
41
28
60
16
88
60
41
88
17
129
88
60
129
18
189
129
88
189
19
277
189
129
277
20
406
277
189
406
21
595
406
277
595
22
872
595
406
872
23
1278
872
595
1278