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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | -1 |
| 2 | 28 |
| 3 | 237 |
| 4 | 1016 |
| 5 | 3115 |
| 6 | 7764 |
| 7 | 16793 |
| 8 | 32752 |
| 9 | 59031 |
| 10 | 99980 |
| 11 | 161029 |
| 12 | 248808 |
| 13 | 371267 |
| 14 | 537796 |
| 15 | 759345 |
| 16 | 1048544 |
| 17 | 1419823 |
| 18 | 1889532 |
| 19 | 2476061 |
| 20 | 3199960 |
| 21 | 4084059 |
| 22 | 5153588 |
| 23 | 6436297 |
| 24 | 7962576 |
| 25 | 9765575 |
| 26 | 11881324 |
| 27 | 14348853 |
| 28 | 17210312 |
| 29 | 20511091 |
| 30 | 24299940 |
| 31 | 28629089 |
| 32 | 33554368 |
| 33 | 39135327 |
| 34 | 45435356 |
[0,-1,28,237,1016,3115,7764,16793,32752,59031, 99980,161029,248808,371267,537796,759345,1048544, 1419823,1889532,2476061,3199960,4084059,5153588, 6436297,7962576,9765575,11881324,14348853, 17210312,20511091,24299940,28629089,33554368, 39135327,45435356] |