The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 11 |
| 2 | 41 |
| 3 | 101 |
| 4 | 401 |
| 5 | 4001 |
| 6 | 4111 |
| 7 | 4441 |
| 8 | 10111 |
| 9 | 10141 |
| 10 | 11411 |
| 11 | 14011 |
| 12 | 14401 |
| 13 | 14411 |
| 14 | 40111 |
| 15 | 41011 |
| 16 | 41141 |
| 17 | 41411 |
| 18 | 44041 |
| 19 | 44101 |
| 20 | 44111 |
| 21 | 100411 |
| 22 | 101111 |
| 23 | 101141 |
| 24 | 101411 |
| 25 | 110441 |
| 26 | 114001 |
| 27 | 114041 |
| 28 | 140111 |
| 29 | 140401 |
| 30 | 140411 |
| 31 | 141041 |
| 32 | 141101 |
| 33 | 400441 |
| 34 | 401101 |
| 35 | 401411 |
| 36 | 404011 |
[11,41,101,401,4001,4111,4441,10111,10141,11411, 14011,14401,14411,40111,41011,41141,41411,44041, 44101,44111,100411,101111,101141,101411,110441, 114001,114041,140111,140401,140411,141041,141101, 400441,401101,401411,404011] |