The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 5 |
| 3 | 16 |
| 4 | 42 |
| 5 | 100 |
| 6 | 228 |
| 7 | 512 |
| 8 | 1144 |
| 9 | 2544 |
| 10 | 5616 |
| 11 | 12288 |
| 12 | 26656 |
| 13 | 57408 |
| 14 | 122944 |
| 15 | 262144 |
| 16 | 556928 |
| 17 | 1179392 |
| 18 | 2490112 |
| 19 | 5242880 |
| 20 | 11010560 |
| 21 | 23069696 |
| 22 | 48235520 |
| 23 | 100663296 |
| 24 | 209713152 |
| 25 | 436203520 |
| 26 | 905965568 |
| 27 | 1879048192 |
| 28 | 3892322304 |
| 29 | 8053080064 |
| 30 | 16643014656 |
| 31 | 34359738368 |
[0,1,5,16,42,100,228,512,1144,2544,5616,12288, 26656,57408,122944,262144,556928,1179392,2490112, 5242880,11010560,23069696,48235520,100663296, 209713152,436203520,905965568,1879048192, 3892322304,8053080064,16643014656,34359738368] |