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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 20 |
| 4 | 64 |
| 5 | 200 |
| 6 | 264 |
| 7 | 492 |
| 8 | 640 |
| 9 | 964 |
| 10 | 2000 |
| 11 | 2064 |
| 12 | 2640 |
| 13 | 4902 |
| 14 | 4920 |
| 15 | 4992 |
| 16 | 6400 |
| 17 | 9640 |
| 18 | 20000 |
| 19 | 20602 |
| 20 | 20640 |
| 21 | 20992 |
| 22 | 24992 |
| 23 | 26400 |
| 24 | 49020 |
| 25 | 49200 |
| 26 | 49902 |
| 27 | 49920 |
| 28 | 49992 |
| 29 | 64000 |
| 30 | 96400 |
| 31 | 200000 |
| 32 | 206020 |
| 33 | 206400 |
| 34 | 209920 |
| 35 | 209992 |
| 36 | 222402 |
| 37 | 246962 |
| 38 | 249920 |
| 39 | 249992 |
| 40 | 264000 |
| 41 | 490200 |
| 42 | 492000 |
| 43 | 494262 |
| 44 | 494462 |
| 45 | 494662 |
| 46 | 499002 |
| 47 | 499020 |
| 48 | 499200 |
| 49 | 499902 |
| 50 | 499920 |
| 51 | 499992 |
[0,2,20,64,200,264,492,640,964,2000,2064,2640, 4902,4920,4992,6400,9640,20000,20602,20640,20992, 24992,26400,49020,49200,49902,49920,49992,64000, 96400,200000,206020,206400,209920,209992,222402, 246962,249920,249992,264000,490200,492000,494262, 494462,494662,499002,499020,499200,499902,499920, 499992] |