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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 4 |
| 3 | 4 |
| 4 | 4 |
| 5 | 5 |
| 6 | 5 |
| 7 | 6 |
| 8 | 6 |
| 9 | 7 |
| 10 | 8 |
| 11 | 9 |
| 12 | 10 |
| 13 | 11 |
| 14 | 13 |
| 15 | 14 |
| 16 | 16 |
| 17 | 19 |
| 18 | 22 |
| 19 | 26 |
| 20 | 30 |
| 21 | 36 |
| 22 | 43 |
| 23 | 52 |
| 24 | 63 |
| 25 | 77 |
| 26 | 95 |
| 27 | 119 |
| 28 | 151 |
| 29 | 193 |
| 30 | 249 |
| 31 | 326 |
| 32 | 433 |
| 33 | 583 |
| 34 | 795 |
| 35 | 1102 |
| 36 | 1551 |
| 37 | 2220 |
| 38 | 3233 |
| 39 | 4796 |
| 40 | 7254 |
| 41 | 11194 |
| 42 | 17643 |
| 43 | 28432 |
| 44 | 46898 |
| 45 | 79271 |
| 46 | 137464 |
| 47 | 244869 |
| 48 | 448658 |
| 49 | 846699 |
| 50 | 1648170 |
| 51 | 3314300 |
| 52 | 6895838 |
[4,4,4,4,5,5,6,6,7,8,9,10,11,13,14,16,19,22,26,30, 36,43,52,63,77,95,119,151,193,249,326,433,583,795, 1102,1551,2220,3233,4796,7254,11194,17643,28432, 46898,79271,137464,244869,448658,846699,1648170, 3314300,6895838] |