Scan down through this list and notice the special relationships between numbers and their triangles.
Triangle Numbers are simply the sum of all the numbers that preceed a number. For example, the triangle of 5 is 1+2+3+4+5=15. Triangles of numbers have a special relationship to their source numbers so in the case for number 5, 15 has a special relationship to number 5. Since 153 is the triangle of 17 then 153 has a special relationship to 17.
1 | 1 |
2 | 3 |
3 | 6 |
4 | 10 |
5 | 15 |
6 | 21 |
7 | 28 |
8 | 36 |
9 | 45 |
10 | 55 |
11 | 66 |
12 | 78 |
13 | 91 |
14 | 105 |
15 | 120 |
16 | 136 |
17 | 153 |
18 | 171 |
19 | 190 |
20 | 210 |
21 | 231 |
22 | 253 |
23 | 276 |
24 | 300 |
25 | 325 |
26 | 351 |
27 | 378 |
28 | 406 |
29 | 435 |
30 | 465 |
31 | 496 |
32 | 528 |
33 | 561 |
34 | 595 |
35 | 630 |
36 | 666 |
37 | 703 |
38 | 741 |
39 | 780 |
40 | 820 |
41 | 861 |
42 | 903 |
43 | 946 |
44 | 990 |
45 | 1035 |
46 | 1081 |
47 | 1128 |
48 | 1176 |
49 | 1225 |
50 | 1275 |
51 | 1326 |
52 | 1378 |
53 | 1431 |
54 | 1485 |
55 | 1540 |
56 | 1596 |
57 | 1653 |
58 | 1711 |
59 | 1770 |
60 | 1830 |
61 | 1891 |
62 | 1953 |
63 | 2016 |
64 | 2080 |
65 | 2145 |
66 | 2211 |
67 | 2278 |
68 | 2346 |
69 | 2415 |
70 | 2485 |
71 | 2556 |
72 | 2628 |
73 | 2701 |
74 | 2775 |
75 | 2850 |
76 | 2926 |
77 | 3003 |
78 | 3081 |
79 | 3160 |
80 | 3240 |
81 | 3321 |
82 | 3403 |
83 | 3486 |
84 | 3570 |
85 | 3655 |
86 | 3741 |
87 | 3828 |
88 | 3916 |
89 | 4005 |
90 | 4095 |
91 | 4186 |
92 | 4278 |
93 | 4371 |
94 | 4465 |
95 | 4560 |
96 | 4656 |
97 | 4753 |
98 | 4851 |
99 | 4950 |
100 | 5050 |