The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 2 | 2 |
| 3 | 6 |
| 4 | 16 |
| 5 | 34 |
| 6 | 77 |
| 7 | 157 |
| 8 | 328 |
| 9 | 655 |
| 10 | 1309 |
| 11 | 2550 |
| 12 | 4958 |
| 13 | 9462 |
| 14 | 17970 |
| 15 | 33714 |
| 16 | 62858 |
| 17 | 116088 |
| 18 | 213125 |
| 19 | 388243 |
| 20 | 703243 |
| 21 | 1265577 |
| 22 | 2265501 |
| 23 | 4032724 |
| 24 | 7143593 |
| 25 | 12591333 |
| 26 | 22094399 |
| 27 | 38597179 |
| 28 | 67149059 |
| 29 | 116350178 |
| 30 | 200838270 |
| 31 | 345396783 |
| 32 | 591925179 |
| 33 | 1010962984 |
| 34 | 1721038512 |
| 35 | 2920622315 |
[2,6,16,34,77,157,328,655,1309,2550,4958,9462, 17970,33714,62858,116088,213125,388243,703243, 1265577,2265501,4032724,7143593,12591333,22094399, 38597179,67149059,116350178,200838270,345396783, 591925179,1010962984,1721038512,2920622315] |