| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 2 |
| 3 | 2 |
| 4 | 6 |
| 5 | 6 |
| 6 | 12 |
| 7 | 12 |
| 8 | 20 |
| 9 | 20 |
| 10 | 30 |
| 11 | 30 |
| 12 | 42 |
| 13 | 42 |
| 14 | 56 |
| 15 | 56 |
| 16 | 72 |
| 17 | 72 |
| 18 | 90 |
| 19 | 90 |
| 20 | 110 |
| 21 | 110 |
| 22 | 132 |
| 23 | 132 |
| 24 | 156 |
| 25 | 156 |
| 26 | 182 |
| 27 | 182 |
| 28 | 210 |
| 29 | 210 |
| 30 | 240 |
| 31 | 240 |
| 32 | 272 |
| 33 | 272 |
| 34 | 306 |
| 35 | 306 |
| 36 | 342 |
| 37 | 342 |
| 38 | 380 |
| 39 | 380 |
| 40 | 420 |
| 41 | 420 |
| 42 | 462 |
| 43 | 462 |
| 44 | 506 |
| 45 | 506 |
| 46 | 552 |
| 47 | 552 |
| 48 | 600 |
| 49 | 600 |
| 50 | 650 |
| 51 | 650 |
| 52 | 702 |
| 53 | 702 |
| 54 | 756 |
| 55 | 756 |
| 56 | 812 |
| 57 | 812 |
[0,0,2,2,6,6,12,12,20,20,30,30,42,42,56,56,72,72, 90,90,110,110,132,132,156,156,182,182,210,210,240, 240,272,272,306,306,342,342,380,380,420,420,462, 462,506,506,552,552,600,600,650,650,702,702,756, 756,812,812] |