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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 4 |
| 3 | 18 |
| 4 | 54 |
| 5 | 129 |
| 6 | 262 |
| 7 | 478 |
| 8 | 807 |
| 9 | 1281 |
| 10 | 1938 |
| 11 | 2821 |
| 12 | 3975 |
| 13 | 5451 |
| 14 | 7305 |
| 15 | 9595 |
| 16 | 12385 |
| 17 | 15744 |
| 18 | 19743 |
| 19 | 24459 |
| 20 | 29974 |
| 21 | 36372 |
| 22 | 43743 |
| 23 | 52182 |
| 24 | 61786 |
| 25 | 72658 |
| 26 | 84906 |
| 27 | 98640 |
| 28 | 113976 |
| 29 | 131035 |
| 30 | 149940 |
| 31 | 170820 |
| 32 | 193809 |
| 33 | 219043 |
| 34 | 246664 |
| 35 | 276819 |
| 36 | 309657 |
[0,0,4,18,54,129,262,478,807,1281,1938,2821,3975, 5451,7305,9595,12385,15744,19743,24459,29974, 36372,43743,52182,61786,72658,84906,98640,113976, 131035,149940,170820,193809,219043,246664,276819, 309657] |