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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 44 |
| 3 | 108 |
| 4 | 236 |
| 5 | 492 |
| 6 | 1004 |
| 7 | 2028 |
| 8 | 4076 |
| 9 | 8172 |
| 10 | 16364 |
| 11 | 32748 |
| 12 | 65516 |
| 13 | 131052 |
| 14 | 262124 |
| 15 | 524268 |
| 16 | 1048556 |
| 17 | 2097132 |
| 18 | 4194284 |
| 19 | 8388588 |
| 20 | 16777196 |
| 21 | 33554412 |
| 22 | 67108844 |
| 23 | 134217708 |
| 24 | 268435436 |
| 25 | 536870892 |
| 26 | 1073741804 |
| 27 | 2147483628 |
| 28 | 4294967276 |
| 29 | 8589934572 |
| 30 | 17179869164 |
[13,44,108,236,492,1004,2028,4076,8172,16364, 32748,65516,131052,262124,524268,1048556,2097132, 4194284,8388588,16777196,33554412,67108844, 134217708,268435436,536870892,1073741804, 2147483628,4294967276,8589934572,17179869164] |