The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 4 |
| 5 | 8 |
| 6 | 4 |
| 7 | 1 |
| 8 | 0 |
| 9 | 9 |
| 10 | 60 |
| 11 | 168 |
| 12 | 256 |
| 13 | 230 |
| 14 | 124 |
| 15 | 40 |
| 16 | 9 |
| 17 | 1 |
| 18 | 0 |
| 19 | 16 |
| 20 | 216 |
| 21 | 1344 |
| 22 | 5105 |
| 23 | 13212 |
| 24 | 24618 |
| 25 | 34012 |
| 26 | 35347 |
| 27 | 27748 |
| 28 | 16412 |
| 29 | 7284 |
| 30 | 2442 |
| 31 | 632 |
| 32 | 124 |
| 33 | 16 |
| 34 | 1 |
| 35 | 0 |
| 36 | 25 |
| 37 | 544 |
| 38 | 5644 |
| 39 | 37136 |
| 40 | 173866 |
| 41 | 616009 |
| 42 | 1714798 |
| 43 | 3843649 |
| 44 | 7053191 |
| 45 | 10716779 |
| 46 | 13586810 |
| 47 | 14446850 |
| 48 | 12928519 |
| 49 | 9764490 |
| 50 | 6242558 |
| 51 | 3390724 |
| 52 | 1570643 |
| 53 | 621183 |
| 54 | 208557 |
| 55 | 58479 |
| 56 | 13306 |
| 57 | 2352 |
| 58 | 302 |
| 59 | 25 |
| 60 | 1 |
[0,1,0,4,8,4,1,0,9,60,168,256,230,124,40,9,1,0,16, 216,1344,5105,13212,24618,34012,35347,27748,16412, 7284,2442,632,124,16,1,0,25,544,5644,37136,173866, 616009,1714798,3843649,7053191,10716779,13586810, 14446850,12928519,9764490,6242558,3390724,1570643, 621183,208557,58479,13306,2352,302,25,1] |