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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 5 |
| 3 | 6 |
| 4 | 8 |
| 5 | 10 |
| 6 | 14 |
| 7 | 18 |
| 8 | 26 |
| 9 | 34 |
| 10 | 50 |
| 11 | 66 |
| 12 | 98 |
| 13 | 130 |
| 14 | 194 |
| 15 | 258 |
| 16 | 386 |
| 17 | 514 |
| 18 | 770 |
| 19 | 1026 |
| 20 | 1538 |
| 21 | 2050 |
| 22 | 3074 |
| 23 | 4098 |
| 24 | 6146 |
| 25 | 8194 |
| 26 | 12290 |
| 27 | 16386 |
| 28 | 24578 |
| 29 | 32770 |
| 30 | 49154 |
| 31 | 65538 |
| 32 | 98306 |
| 33 | 131074 |
| 34 | 196610 |
| 35 | 262146 |
| 36 | 393218 |
| 37 | 524290 |
| 38 | 786434 |
| 39 | 1048578 |
| 40 | 1572866 |
| 41 | 2097154 |
| 42 | 3145730 |
[4,5,6,8,10,14,18,26,34,50,66,98,130,194,258,386, 514,770,1026,1538,2050,3074,4098,6146,8194,12290, 16386,24578,32770,49154,65538,98306,131074,196610, 262146,393218,524290,786434,1048578,1572866, 2097154,3145730] |