The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 4 |
| 2 | 56 |
| 3 | 204 |
| 4 | 496 |
| 5 | 980 |
| 6 | 1704 |
| 7 | 2716 |
| 8 | 4064 |
| 9 | 5796 |
| 10 | 7960 |
| 11 | 10604 |
| 12 | 13776 |
| 13 | 17524 |
| 14 | 21896 |
| 15 | 26940 |
| 16 | 32704 |
| 17 | 39236 |
| 18 | 46584 |
| 19 | 54796 |
| 20 | 63920 |
| 21 | 74004 |
| 22 | 85096 |
| 23 | 97244 |
| 24 | 110496 |
| 25 | 124900 |
| 26 | 140504 |
| 27 | 157356 |
| 28 | 175504 |
| 29 | 194996 |
| 30 | 215880 |
| 31 | 238204 |
| 32 | 262016 |
| 33 | 287364 |
| 34 | 314296 |
| 35 | 342860 |
| 36 | 373104 |
| 37 | 405076 |
[0,4,56,204,496,980,1704,2716,4064,5796,7960, 10604,13776,17524,21896,26940,32704,39236,46584, 54796,63920,74004,85096,97244,110496,124900, 140504,157356,175504,194996,215880,238204,262016, 287364,314296,342860,373104,405076] |