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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 22 |
| 3 | 153 |
| 4 | 624 |
| 5 | 1875 |
| 6 | 4626 |
| 7 | 9947 |
| 8 | 19328 |
| 9 | 34749 |
| 10 | 58750 |
| 11 | 94501 |
| 12 | 145872 |
| 13 | 217503 |
| 14 | 314874 |
| 15 | 444375 |
| 16 | 613376 |
| 17 | 830297 |
| 18 | 1104678 |
| 19 | 1447249 |
| 20 | 1870000 |
| 21 | 2386251 |
| 22 | 3010722 |
| 23 | 3759603 |
| 24 | 4650624 |
| 25 | 5703125 |
| 26 | 6938126 |
| 27 | 8378397 |
| 28 | 10048528 |
| 29 | 11974999 |
| 30 | 14186250 |
| 31 | 16712751 |
| 32 | 19587072 |
[0,1,22,153,624,1875,4626,9947,19328,34749,58750, 94501,145872,217503,314874,444375,613376,830297, 1104678,1447249,1870000,2386251,3010722,3759603, 4650624,5703125,6938126,8378397,10048528,11974999, 14186250,16712751,19587072] |