| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 11 |
| 3 | 41 |
| 4 | 151 |
| 5 | 541 |
| 6 | 1151 |
| 7 | 1451 |
| 8 | 1511 |
| 9 | 4111 |
| 10 | 4441 |
| 11 | 4451 |
| 12 | 5441 |
| 13 | 11411 |
| 14 | 11551 |
| 15 | 14411 |
| 16 | 14551 |
| 17 | 15451 |
| 18 | 15511 |
| 19 | 15541 |
| 20 | 15551 |
| 21 | 41141 |
| 22 | 41411 |
| 23 | 44111 |
| 24 | 45541 |
| 25 | 51151 |
| 26 | 51511 |
| 27 | 51551 |
| 28 | 54151 |
| 29 | 54541 |
| 30 | 55411 |
| 31 | 55441 |
| 32 | 55511 |
| 33 | 55541 |
| 34 | 114451 |
| 35 | 115151 |
| 36 | 141511 |
| 37 | 141551 |
| 38 | 144451 |
| 39 | 144511 |
[5,11,41,151,541,1151,1451,1511,4111,4441,4451, 5441,11411,11551,14411,14551,15451,15511,15541, 15551,41141,41411,44111,45541,51151,51511,51551, 54151,54541,55411,55441,55511,55541,114451,115151, 141511,141551,144451,144511] |