The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 6 |
| 3 | 12 |
| 4 | 18 |
| 5 | 72 |
| 6 | 108 |
| 7 | 192 |
| 8 | 432 |
| 9 | 1152 |
| 10 | 2592 |
| 11 | 139968 |
| 12 | 472392 |
| 13 | 786432 |
| 14 | 995328 |
| 15 | 57395628 |
| 16 | 63700992 |
| 17 | 169869312 |
| 18 | 4076863488 |
| 19 | 10871635968 |
| 20 | 2348273369088 |
| 21 | 56358560858112 |
| 22 | 79164837199872 |
| 23 | 84537841287168 |
| 24 | 150289495621632 |
[4,6,12,18,72,108,192,432,1152,2592,139968,472392, 786432,995328,57395628,63700992,169869312, 4076863488,10871635968,2348273369088, 56358560858112,79164837199872,84537841287168, 150289495621632] |