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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 6 |
| 3 | 10 |
| 4 | 20 |
| 5 | 26 |
| 6 | 54 |
| 7 | 66 |
| 8 | 120 |
| 9 | 164 |
| 10 | 262 |
| 11 | 346 |
| 12 | 572 |
| 13 | 730 |
| 14 | 1110 |
| 15 | 1506 |
| 16 | 2182 |
| 17 | 2866 |
| 18 | 4156 |
| 19 | 5402 |
| 20 | 7612 |
| 21 | 9978 |
| 22 | 13638 |
| 23 | 17730 |
| 24 | 24200 |
| 25 | 31092 |
| 26 | 41558 |
| 27 | 53572 |
| 28 | 70692 |
| 29 | 90250 |
| 30 | 118406 |
| 31 | 150146 |
| 32 | 194794 |
| 33 | 246610 |
| 34 | 316678 |
| 35 | 398730 |
| 36 | 509560 |
| 37 | 637594 |
| 38 | 808342 |
| 39 | 1009186 |
| 40 | 1270984 |
| 41 | 1578530 |
| 42 | 1978758 |
| 43 | 2447066 |
[2,6,10,20,26,54,66,120,164,262,346,572,730,1110, 1506,2182,2866,4156,5402,7612,9978,13638,17730, 24200,31092,41558,53572,70692,90250,118406,150146, 194794,246610,316678,398730,509560,637594,808342, 1009186,1270984,1578530,1978758,2447066] |