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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 16 |
| 3 | 10 |
| 4 | 50 |
| 5 | 100 |
| 6 | 20 |
| 7 | 130 |
| 8 | 684 |
| 9 | 400 |
| 10 | 35 |
| 11 | 296 |
| 12 | 3526 |
| 13 | 4739 |
| 14 | 1225 |
| 15 | 56 |
| 16 | 610 |
| 17 | 14751 |
| 18 | 38561 |
| 19 | 22988 |
| 20 | 3136 |
| 21 | 84 |
| 22 | 1163 |
| 23 | 52591 |
| 24 | 242114 |
| 25 | 272130 |
| 26 | 87878 |
| 27 | 7056 |
| 28 | 120 |
| 29 | 2083 |
| 30 | 165212 |
| 31 | 1253770 |
| 32 | 2335459 |
| 33 | 1460836 |
| 34 | 282372 |
| 35 | 14400 |
| 36 | 165 |
| 37 | 3544 |
| 38 | 468292 |
| 39 | 5588411 |
| 40 | 15925611 |
[4,16,10,50,100,20,130,684,400,35,296,3526,4739, 1225,56,610,14751,38561,22988,3136,84,1163,52591, 242114,272130,87878,7056,120,2083,165212,1253770, 2335459,1460836,282372,14400,165,3544,468292, 5588411,15925611] |