Pet Closeness and Level

How much closeness is needed for each pet level?

Pet Leveling Table
Lvl l Total closeness l Closeness needed for next lvl
1 0 1
2 1 2
3 3 3
4 6 8
5 14 17
6 31 29
7 60 48
8 108 73
9 181 106
10 287 147
11 434 198
12 632 259
13 891 333
14 1224 418
15 1642 519
16 2161 633
17 2794 761
18 3557 912
19 4467 1083
20 5542 1256
21 6798 1452
22 8250 1700
23 9950 1950
24 11900 2200
25 14100 2500
26 16600 2800
27 19400 3200
28 22600 3500
29 26100 3900
30 30000 End