The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 13 |
| 5 | 19 |
| 6 | 31 |
| 7 | 37 |
| 8 | 63 |
| 9 | 131 |
| 10 | 313 |
| 11 | 363 |
| 12 | 369 |
| 13 | 796 |
| 14 | 1319 |
| 15 | 3376 |
| 16 | 11731 |
| 17 | 11736 |
| 18 | 17796 |
| 19 | 31131 |
| 20 | 31619 |
| 21 | 61131 |
| 22 | 61613 |
| 23 | 61637 |
| 24 | 117131 |
| 25 | 133937 |
| 26 | 191363 |
| 27 | 193176 |
| 28 | 311637 |
| 29 | 311736 |
| 30 | 333736 |
| 31 | 336736 |
| 32 | 369613 |
| 33 | 616376 |
| 34 | 969119 |
| 35 | 1167637 |
| 36 | 1316736 |
| 37 | 1913619 |
| 38 | 1917637 |
| 39 | 1991637 |
| 40 | 3116376 |
| 41 | 3116619 |
| 42 | 3336731 |
| 43 | 3337363 |
| 44 | 3371376 |
| 45 | 6113376 |
| 46 | 6139376 |
| 47 | 6139769 |
| 48 | 6319313 |
[1,3,6,13,19,31,37,63,131,313,363,369,796,1319, 3376,11731,11736,17796,31131,31619,61131,61613, 61637,117131,133937,191363,193176,311637,311736, 333736,336736,369613,616376,969119,1167637, 1316736,1913619,1917637,1991637,3116376,3116619, 3336731,3337363,3371376,6113376,6139376,6139769, 6319313] |