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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 16 |
| 4 | 64 |
| 5 | 144 |
| 6 | 256 |
| 7 | 576 |
| 8 | 1024 |
| 9 | 1296 |
| 10 | 2304 |
| 11 | 5184 |
| 12 | 9216 |
| 13 | 20736 |
| 14 | 82944 |
| 15 | 186624 |
| 16 | 331776 |
| 17 | 746496 |
| 18 | 1327104 |
| 19 | 2073600 |
| 20 | 2985984 |
| 21 | 5308416 |
| 22 | 8294400 |
| 23 | 18662400 |
| 24 | 21233664 |
| 25 | 26873856 |
| 26 | 33177600 |
| 27 | 47775744 |
| 28 | 51840000 |
| 29 | 74649600 |
| 30 | 107495424 |
| 31 | 132710400 |
| 32 | 207360000 |
| 33 | 429981696 |
| 34 | 530841600 |
| 35 | 671846400 |
| 36 | 829440000 |
| 37 | 1194393600 |
| 38 | 1719926784 |
| 39 | 1866240000 |
| 40 | 2687385600 |
[1,4,16,64,144,256,576,1024,1296,2304,5184,9216, 20736,82944,186624,331776,746496,1327104,2073600, 2985984,5308416,8294400,18662400,21233664, 26873856,33177600,47775744,51840000,74649600, 107495424,132710400,207360000,429981696,530841600, 671846400,829440000,1194393600,1719926784, 1866240000,2687385600] |