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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 4 |
| 3 | 18 |
| 4 | 24 |
| 5 | 76 |
| 6 | 118 |
| 7 | 124 |
| 8 | 282 |
| 9 | 576 |
| 10 | 618 |
| 11 | 624 |
| 12 | 724 |
| 13 | 2782 |
| 14 | 3076 |
| 15 | 3118 |
| 16 | 3124 |
| 17 | 13224 |
| 18 | 15282 |
| 19 | 15576 |
| 20 | 15618 |
| 21 | 15624 |
| 22 | 61318 |
| 23 | 75724 |
| 24 | 77782 |
| 25 | 78076 |
| 26 | 78118 |
| 27 | 78124 |
| 28 | 272976 |
| 29 | 373818 |
| 30 | 388224 |
| 31 | 390282 |
| 32 | 390576 |
| 33 | 390618 |
| 34 | 390624 |
| 35 | 1129582 |
| 36 | 1835476 |
| 37 | 1936318 |
| 38 | 1950724 |
| 39 | 1952782 |
[0,4,18,24,76,118,124,282,576,618,624,724,2782, 3076,3118,3124,13224,15282,15576,15618,15624, 61318,75724,77782,78076,78118,78124,272976,373818, 388224,390282,390576,390618,390624,1129582, 1835476,1936318,1950724,1952782] |