One more has been confirmed thanks to dyerbr .

This is my list updated though the time of this posting:
CDP - XPs
1- 0
2- 47
3- 63
4- 84
5- 135
6- 186
7- 261
8- 324
9- 397
10 -1030 (XP Bonus Day)
11- 553
12- 636
13- 729
14- 822
15- Starting on day 15, you
use this formula: 880 + (# of days * 3).
Except on bonus XP days:
Day 10: 1030 XP = 880 + (10 *
15)
Day 20: 2060 XP = 880 + 880 +
(20 * 15)
Day 50: 2260 XP = 880 + 880 +
(50 * 10)
Day 75: 2510 XP = 880 + 880 +
(75 * 10)
Day 100: 2760 XP = 880 + 880
+ (100 * 10)
Day 150: 3260 XP = 880 + 880
+ (150 * 10)
Day 200: 3760 XP = 880 + 880 + ( 200 * 10)
Day 250: 4260 XP = 880 + 880 + (250 * 10)
Day 300: 4760 XP = 880 + 880 + (300 * 10)
Day 350: 5260 XP = 880 + 880
+ (350 * 10)
Day 365: 5410 XP = 880 + 880
+ (365 * 10)
Day 400: 5760 XP = 880 + 88 + (400 * 10)
Day 450: 6260 XP = 880 + 880
+ (450 * 10)
Day: 500: 6760 XP = 880 + 880 + (500 * 10)
Day 550: 7260 XP = 880 + 880 + (550 *10)
Day 600: 7760 XP = 880 + 880 + (600 * 10)
Day 650: 8260 XP = 880 + 880
+ (650 * 10)
Day 700: 8760 XP = 880 + 880 + (700 * 10)
Day 730: 9060 XP = 880 + 880 + (730 * 10)
Day 750: 9260 XP = 880 + 880 + (750 * 10)
Day 800: 9760 XP = 880 + 880 + (800 * 10)
Day 850: 10,260 XP = 880 + 880 + (850 * 10) (1)
Day 900: 10760 XP = 880 + 880
+ (900 * 10)
Day 950: 11260 XP = 880 + 880 + (950 * 10)
Day 1000: 11760 XP = 880 + 880 + (1000 * 10)
Day 2000: 21760 XP = 880 +
880 + (2000 * 10)
Note:
(1) Not confirmed with a screen shot but 99.999% certain those are the numbers.
EE