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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 4 |
| 4 | 9 |
| 5 | 196 |
| 6 | 784 |
| 7 | 28900 |
| 8 | 33489 |
| 9 | 38416 |
| 10 | 43681 |
| 11 | 94864 |
| 12 | 115600 |
| 13 | 124609 |
| 14 | 133956 |
| 15 | 4831204 |
| 16 | 5664400 |
| 17 | 6563844 |
| 18 | 8398404 |
| 19 | 16208676 |
| 20 | 17994564 |
| 21 | 19324816 |
| 22 | 20958084 |
| 23 | 50098084 |
| 24 | 58706244 |
| 25 | 815787844 |
| 26 | 825470361 |
| 27 | 835210000 |
| 28 | 845006761 |
| 29 | 946915984 |
[0,1,4,9,196,784,28900,33489,38416,43681,94864, 115600,124609,133956,4831204,5664400,6563844, 8398404,16208676,17994564,19324816,20958084, 50098084,58706244,815787844,825470361,835210000, 845006761,946915984] |