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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 12 |
| 5 | 38 |
| 6 | 81 |
| 7 | 185 |
| 8 | 336 |
| 9 | 549 |
| 10 | 900 |
| 11 | 1365 |
| 12 | 1944 |
| 13 | 2794 |
| 14 | 3822 |
| 15 | 5070 |
| 16 | 6720 |
| 17 | 8680 |
| 18 | 10935 |
| 19 | 13821 |
| 20 | 17100 |
| 21 | 20853 |
| 22 | 25410 |
| 23 | 30569 |
| 24 | 36288 |
| 25 | 43148 |
| 26 | 50700 |
| 27 | 59076 |
| 28 | 68796 |
| 29 | 79506 |
| 30 | 91125 |
| 31 | 104545 |
| 32 | 119040 |
| 33 | 134805 |
| 34 | 152592 |
| 35 | 171853 |
| 36 | 192456 |
| 37 | 215670 |
| 38 | 240426 |
| 39 | 266994 |
| 40 | 296400 |
| 41 | 327860 |
[0,0,0,0,12,38,81,185,336,549,900,1365,1944,2794, 3822,5070,6720,8680,10935,13821,17100,20853,25410, 30569,36288,43148,50700,59076,68796,79506,91125, 104545,119040,134805,152592,171853,192456,215670, 240426,266994,296400,327860] |