The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 24 |
| 2 | 40 |
| 3 | 66 |
| 4 | 112 |
| 5 | 192 |
| 6 | 334 |
| 7 | 588 |
| 8 | 1048 |
| 9 | 1890 |
| 10 | 3448 |
| 11 | 6360 |
| 12 | 11854 |
| 13 | 22308 |
| 14 | 42352 |
| 15 | 81042 |
| 16 | 156160 |
| 17 | 302736 |
| 18 | 589966 |
| 19 | 1154844 |
| 20 | 2269096 |
| 21 | 4472514 |
| 22 | 8838760 |
| 23 | 17505576 |
| 24 | 34732942 |
| 25 | 69015732 |
| 26 | 137303104 |
| 27 | 273427698 |
| 28 | 544948528 |
| 29 | 1086811680 |
| 30 | 2168631118 |
| 31 | 4329184620 |
[24,40,66,112,192,334,588,1048,1890,3448,6360, 11854,22308,42352,81042,156160,302736,589966, 1154844,2269096,4472514,8838760,17505576,34732942, 69015732,137303104,273427698,544948528,1086811680, 2168631118,4329184620] |