| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 20 |
| 3 | 78 |
| 4 | 192 |
| 5 | 380 |
| 6 | 660 |
| 7 | 1050 |
| 8 | 1568 |
| 9 | 2232 |
| 10 | 3060 |
| 11 | 4070 |
| 12 | 5280 |
| 13 | 6708 |
| 14 | 8372 |
| 15 | 10290 |
| 16 | 12480 |
| 17 | 14960 |
| 18 | 17748 |
| 19 | 20862 |
| 20 | 24320 |
| 21 | 28140 |
| 22 | 32340 |
| 23 | 36938 |
| 24 | 41952 |
| 25 | 47400 |
| 26 | 53300 |
| 27 | 59670 |
| 28 | 66528 |
| 29 | 73892 |
| 30 | 81780 |
| 31 | 90210 |
| 32 | 99200 |
| 33 | 108768 |
| 34 | 118932 |
| 35 | 129710 |
| 36 | 141120 |
| 37 | 153180 |
| 38 | 165908 |
| 39 | 179322 |
[0,0,20,78,192,380,660,1050,1568,2232,3060,4070, 5280,6708,8372,10290,12480,14960,17748,20862, 24320,28140,32340,36938,41952,47400,53300,59670, 66528,73892,81780,90210,99200,108768,118932, 129710,141120,153180,165908,179322] |