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A027005 as a simple table
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 19 |
| 3 | 101 |
| 4 | 370 |
| 5 | 1148 |
| 6 | 3278 |
| 7 | 8967 |
| 8 | 23993 |
| 9 | 63483 |
| 10 | 167040 |
| 11 | 438346 |
| 12 | 1148844 |
| 13 | 3009181 |
| 14 | 7879855 |
| 15 | 20631713 |
| 16 | 54016798 |
| 17 | 141420392 |
| 18 | 370246298 |
| 19 | 969320643 |
| 20 | 2537718005 |
| 21 | 6643835991 |
| 22 | 17393792844 |
| 23 | 45537545686 |
| 24 | 119218847640 |
| 25 | 312119000953 |
| 26 | 817138159243 |
| 27 | 2139295481117 |
[1,19,101,370,1148,3278,8967,23993,63483,167040, 438346,1148844,3009181,7879855,20631713,54016798, 141420392,370246298,969320643,2537718005, 6643835991,17393792844,45537545686,119218847640, 312119000953,817138159243,2139295481117] |