数字k的不规则三角形,如下所示A038873号(n) 是k^2-2的最大素因子:
n\k |1|2|3|4|5|6|7|8|9|10|11
------------------------------------------------------------------------
1 | 2 | | | | | | | | | |
2 | 3 | 4 | 10 | | | | | | | |
3 | 6 | 11 | 45 | 108 | | | | | | |
4 | 5 | 18 | 28 | 74 | 156 | 235 | | | | |
5 | 8 | 23 | 39 | 116 | 1201 | | | | | |
6 | 17 | 24 | 58 | 147 | 304 | 550 | 2272 | | | |
7 | 7 | 40 | 54 | 87 | 101 | 181 | 557 | 1558 | | |
8 | 12 | 59 | 130 | 225 | 414 | 1077 | 1124 | 2686 | 3420 | 4035 |
9 | 32 | 41 | 178 | 333 | 698 | 844 | 1638 | 4567 | | |
10 | 9 | 70 | 88 | 228 | 386 | 465 | 623 | 878 | 1431 | 7654 | 9313