The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 6 |
| 2 | 87 |
| 3 | 417 |
| 4 | 1278 |
| 5 | 3060 |
| 6 | 6261 |
| 7 | 11487 |
| 8 | 19452 |
| 9 | 30978 |
| 10 | 46995 |
| 11 | 68541 |
| 12 | 96762 |
| 13 | 132912 |
| 14 | 178353 |
| 15 | 234555 |
| 16 | 303096 |
| 17 | 385662 |
| 18 | 484047 |
| 19 | 600153 |
| 20 | 735990 |
| 21 | 893676 |
| 22 | 1075437 |
| 23 | 1283607 |
| 24 | 1520628 |
| 25 | 1789050 |
| 26 | 2091531 |
| 27 | 2430837 |
| 28 | 2809842 |
| 29 | 3231528 |
| 30 | 3698985 |
| 31 | 4215411 |
| 32 | 4784112 |
| 33 | 5408502 |
[0,6,87,417,1278,3060,6261,11487,19452,30978, 46995,68541,96762,132912,178353,234555,303096, 385662,484047,600153,735990,893676,1075437, 1283607,1520628,1789050,2091531,2430837,2809842, 3231528,3698985,4215411,4784112,5408502] |