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| n | a(n) |
|---|---|
| 1 | 48 |
| 2 | 330 |
| 3 | 2262 |
| 4 | 15474 |
| 5 | 105642 |
| 6 | 719838 |
| 7 | 4895886 |
| 8 | 33239874 |
| 9 | 225294570 |
| 10 | 1524529134 |
| 11 | 10300146510 |
| 12 | 69486664818 |
| 13 | 468097569162 |
| 14 | 3149005428126 |
| 15 | 21156149373582 |
| 16 | 141954447726498 |
| 17 | 951332764533354 |
| 18 | 6368070500470926 |
| 19 | 42578969613094542 |
[48,330,2262,15474,105642,719838,4895886,33239874, 225294570,1524529134,10300146510,69486664818, 468097569162,3149005428126,21156149373582, 141954447726498,951332764533354,6368070500470926, 42578969613094542] |