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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 4 |
| 2 | 26 |
| 3 | 85 |
| 4 | 202 |
| 5 | 393 |
| 6 | 679 |
| 7 | 1078 |
| 8 | 1609 |
| 9 | 2291 |
| 10 | 3142 |
| 11 | 4182 |
| 12 | 5429 |
| 13 | 6903 |
| 14 | 8621 |
| 15 | 10603 |
| 16 | 12868 |
| 17 | 15435 |
| 18 | 18322 |
| 19 | 21549 |
| 20 | 25133 |
| 21 | 29095 |
| 22 | 33452 |
| 23 | 38224 |
| 24 | 43430 |
| 25 | 49088 |
| 26 | 55217 |
| 27 | 61836 |
| 28 | 68965 |
| 29 | 76621 |
| 30 | 84824 |
| 31 | 93592 |
| 32 | 102944 |
| 33 | 112900 |
| 34 | 123478 |
| 35 | 134696 |
| 36 | 146575 |
| 37 | 159132 |
| 38 | 172386 |
| 39 | 186357 |
| 40 | 201062 |
| 41 | 216522 |
| 42 | 232755 |
[0,4,26,85,202,393,679,1078,1609,2291,3142,4182, 5429,6903,8621,10603,12868,15435,18322,21549, 25133,29095,33452,38224,43430,49088,55217,61836, 68965,76621,84824,93592,102944,112900,123478, 134696,146575,159132,172386,186357,201062,216522, 232755] |