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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 3 |
| 2 | 12 |
| 3 | 28 |
| 4 | 77 |
| 5 | 198 |
| 6 | 522 |
| 7 | 1363 |
| 8 | 3572 |
| 9 | 9348 |
| 10 | 24477 |
| 11 | 64078 |
| 12 | 167762 |
| 13 | 439203 |
| 14 | 1149852 |
| 15 | 3010348 |
| 16 | 7881197 |
| 17 | 20633238 |
| 18 | 54018522 |
| 19 | 141422323 |
| 20 | 370248452 |
| 21 | 969323028 |
| 22 | 2537720637 |
| 23 | 6643838878 |
| 24 | 17393796002 |
| 25 | 45537549123 |
| 26 | 119218851372 |
| 27 | 312119004988 |
| 28 | 817138163597 |
| 29 | 2139295485798 |
| 30 | 5600748293802 |
| 31 | 14662949395603 |
| 32 | 38388099893012 |
| 33 | 100501350283428 |
[2,3,12,28,77,198,522,1363,3572,9348,24477,64078, 167762,439203,1149852,3010348,7881197,20633238, 54018522,141422323,370248452,969323028,2537720637, 6643838878,17393796002,45537549123,119218851372, 312119004988,817138163597,2139295485798, 5600748293802,14662949395603,38388099893012, 100501350283428] |