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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 41 |
| 5 | 249 |
| 6 | 3278 |
| 7 | 3527 |
| 8 | 6805 |
| 9 | 10332 |
| 10 | 564733 |
| 11 | 575065 |
| 12 | 1139798 |
| 13 | 1714863 |
| 14 | 23433017 |
| 15 | 142312965 |
| 16 | 1873501562 |
| 17 | 2015814527 |
| 18 | 3889316089 |
| 19 | 5905130616 |
| 20 | 322766369353 |
| 21 | 328671499969 |
| 22 | 651437869322 |
| 23 | 980109369291 |
| 24 | 13392859670105 |
| 25 | 81337267389921 |
| 26 | 1070777335739078 |
[1,1,2,3,41,249,3278,3527,6805,10332,564733, 575065,1139798,1714863,23433017,142312965, 1873501562,2015814527,3889316089,5905130616, 322766369353,328671499969,651437869322, 980109369291,13392859670105,81337267389921, 1070777335739078] |