typo in readme

[ZxMYS]

Threads: | t1 | t2 | t3 | t4 |
| 8 3 1 9 | 1 2 7 5 | 9 3 6 4 | 2 0 2 5 |
| 38 19 | 12 57 | 39 46 | 02 25 |
| 1398 | 1257 | 3469 | 0225 |

1398 should be 1389

[Sujit-Halder]

It will not work for odd number of elements??