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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 3 |
| 2 | 2 |
| 3 | 6 |
| 4 | 10 |
| 5 | 30 |
| 6 | 34 |
| 7 | 126 |
| 8 | 170 |
| 9 | 438 |
| 10 | 650 |
| 11 | 2046 |
| 12 | 2210 |
| 13 | 8190 |
| 14 | 10794 |
| 15 | 27030 |
| 16 | 43690 |
| 17 | 131070 |
| 18 | 141474 |
| 19 | 524286 |
| 20 | 666250 |
| 21 | 1781046 |
| 22 | 2794154 |
| 23 | 8388606 |
| 24 | 9054370 |
| 25 | 32472030 |
| 26 | 44731050 |
| 27 | 115043766 |
| 28 | 176859690 |
| 29 | 536870910 |
| 30 | 545925250 |
| 31 | 2147483646 |
| 32 | 2863311530 |
| 33 | 7358604726 |
| 34 | 11453115050 |
[0,3,2,6,10,30,34,126,170,438,650,2046,2210,8190, 10794,27030,43690,131070,141474,524286,666250, 1781046,2794154,8388606,9054370,32472030,44731050, 115043766,176859690,536870910,545925250, 2147483646,2863311530,7358604726,11453115050] |