The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 140 |
| 2 | 270 |
| 3 | 1638 |
| 4 | 2970 |
| 5 | 6200 |
| 6 | 8190 |
| 7 | 18600 |
| 8 | 18620 |
| 9 | 27846 |
| 10 | 55860 |
| 11 | 105664 |
| 12 | 117800 |
| 13 | 167400 |
| 14 | 173600 |
| 15 | 237510 |
| 16 | 242060 |
| 17 | 360360 |
| 18 | 539400 |
| 19 | 726180 |
| 20 | 753480 |
| 21 | 950976 |
| 22 | 1089270 |
| 23 | 1421280 |
| 24 | 1539720 |
| 25 | 2229500 |
| 26 | 2290260 |
| 27 | 2457000 |
| 28 | 2845800 |
| 29 | 4358600 |
| 30 | 4713984 |
| 31 | 4754880 |
| 32 | 5772200 |
| 33 | 6051500 |
[140,270,1638,2970,6200,8190,18600,18620,27846, 55860,105664,117800,167400,173600,237510,242060, 360360,539400,726180,753480,950976,1089270, 1421280,1539720,2229500,2290260,2457000,2845800, 4358600,4713984,4754880,5772200,6051500] |