The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 45 |
| 3 | 2021 |
| 4 | 3132 |
| 5 | 1456414565 |
| 6 | 3823938240 |
| 7 | 6991969920 |
| 8 | 120395120396 |
| 9 | 426436426437 |
| 10 | 902596902597 |
| 11 | 74780207478021 |
| 12 | 90902209090221 |
| 13 | 66713320846671332085 |
| 14 | 81142640598114264060 |
| 15 | 84822272598482227260 |
| 16 | 99002509969900250997 |
| 17 | 22443387868362244338786837 |
| 18 | 24905771529642490577152965 |
[12,45,2021,3132,1456414565,3823938240,6991969920, 120395120396,426436426437,902596902597, 74780207478021,90902209090221, 66713320846671332085,81142640598114264060, 84822272598482227260,99002509969900250997, 22443387868362244338786837, 24905771529642490577152965] |