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| n | a(n) |
|---|---|
| 1 | 20 |
| 2 | 90 |
| 3 | 272 |
| 4 | 468 |
| 5 | 650 |
| 6 | 1332 |
| 7 | 2450 |
| 8 | 2900 |
| 9 | 3600 |
| 10 | 4160 |
| 11 | 6642 |
| 12 | 7650 |
| 13 | 10100 |
| 14 | 10388 |
| 15 | 14762 |
| 16 | 16400 |
| 17 | 20880 |
| 18 | 25578 |
| 19 | 27540 |
| 20 | 28730 |
| 21 | 38612 |
| 22 | 42048 |
| 23 | 50850 |
| 24 | 50960 |
| 25 | 54900 |
| 26 | 65792 |
| 27 | 83810 |
| 28 | 90650 |
| 29 | 98100 |
| 30 | 116948 |
| 31 | 125712 |
| 32 | 130682 |
| 33 | 141570 |
| 34 | 142400 |
| 35 | 149940 |
| 36 | 160400 |
| 37 | 194922 |
| 38 | 206100 |
| 39 | 214650 |
[20,90,272,468,650,1332,2450,2900,3600,4160,6642, 7650,10100,10388,14762,16400,20880,25578,27540, 28730,38612,42048,50850,50960,54900,65792,83810, 90650,98100,116948,125712,130682,141570,142400, 149940,160400,194922,206100,214650] |