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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 24 |
| 4 | 74 |
| 5 | 170 |
| 6 | 362 |
| 7 | 642 |
| 8 | 1110 |
| 9 | 1766 |
| 10 | 2706 |
| 11 | 3894 |
| 12 | 5558 |
| 13 | 7602 |
| 14 | 10326 |
| 15 | 13562 |
| 16 | 17510 |
| 17 | 22178 |
| 18 | 28006 |
| 19 | 34634 |
| 20 | 42722 |
| 21 | 51922 |
| 22 | 62570 |
| 23 | 74450 |
| 24 | 88462 |
| 25 | 103994 |
| 26 | 121862 |
| 27 | 141482 |
| 28 | 163610 |
| 29 | 187886 |
| 30 | 215578 |
| 31 | 245430 |
| 32 | 279198 |
| 33 | 315958 |
| 34 | 356390 |
| 35 | 399830 |
| 36 | 447542 |
| 37 | 498626 |
| 38 | 555278 |
| 39 | 615698 |
| 40 | 681206 |
[1,6,24,74,170,362,642,1110,1766,2706,3894,5558, 7602,10326,13562,17510,22178,28006,34634,42722, 51922,62570,74450,88462,103994,121862,141482, 163610,187886,215578,245430,279198,315958,356390, 399830,447542,498626,555278,615698,681206] |