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| n | a(n) |
|---|---|
| 0 | 4 |
| 1 | 15 |
| 2 | 26 |
| 3 | 49 |
| 4 | 96 |
| 5 | 191 |
| 6 | 318 |
| 7 | 573 |
| 8 | 1084 |
| 9 | 2107 |
| 10 | 4154 |
| 11 | 8249 |
| 12 | 16440 |
| 13 | 32823 |
| 14 | 65590 |
| 15 | 131125 |
| 16 | 262196 |
| 17 | 524339 |
| 18 | 1048626 |
| 19 | 2097201 |
| 20 | 4194352 |
| 21 | 8388655 |
| 22 | 16777262 |
| 23 | 33554477 |
| 24 | 67108908 |
| 25 | 134217771 |
| 26 | 268435498 |
| 27 | 536870953 |
| 28 | 1073741864 |
| 29 | 2147483687 |
| 30 | 4294967334 |
| 31 | 8589934629 |
| 32 | 17179869220 |
[4,15,26,49,96,191,318,573,1084,2107,4154,8249, 16440,32823,65590,131125,262196,524339,1048626, 2097201,4194352,8388655,16777262,33554477, 67108908,134217771,268435498,536870953,1073741864, 2147483687,4294967334,8589934629,17179869220] |