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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 4 |
| 2 | 4 |
| 3 | 4 |
| 4 | 379 |
| 5 | 1004 |
| 6 | 10379 |
| 7 | 26004 |
| 8 | 104129 |
| 9 | 1276004 |
| 10 | 9088504 |
| 11 | 28619754 |
| 12 | 126276004 |
| 13 | 614557254 |
| 14 | 3055963504 |
| 15 | 27470026004 |
| 16 | 57987604129 |
| 17 | 57987604129 |
| 18 | 820927057254 |
| 19 | 16079716119754 |
| 20 | 16079716119754 |
| 21 | 206814579401004 |
| 22 | 1637326054010379 |
| 23 | 6405697636041629 |
| 24 | 30247555546197879 |
[0,4,4,4,379,1004,10379,26004,104129,1276004, 9088504,28619754,126276004,614557254,3055963504, 27470026004,57987604129,57987604129,820927057254, 16079716119754,16079716119754,206814579401004, 1637326054010379,6405697636041629, 30247555546197879] |