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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 8 |
| 2 | 24 |
| 3 | 62 |
| 4 | 148 |
| 5 | 330 |
| 6 | 710 |
| 7 | 1464 |
| 8 | 2962 |
| 9 | 5814 |
| 10 | 11288 |
| 11 | 21406 |
| 12 | 40364 |
| 13 | 74570 |
| 14 | 137602 |
| 15 | 249088 |
| 16 | 451868 |
| 17 | 804766 |
| 18 | 1440580 |
| 19 | 2529686 |
| 20 | 4482584 |
| 21 | 7775166 |
| 22 | 13664146 |
| 23 | 23446020 |
| 24 | 40953840 |
| 25 | 69518842 |
| 26 | 120978656 |
| 27 | 203223692 |
| 28 | 352808860 |
| 29 | 586473542 |
| 30 | 1018405966 |
| 31 | 1671890010 |
| 32 | 2913173846 |
| 33 | 4717224772 |
| 34 | 8265261498 |
| 35 | 13170191912 |
| 36 | 23329646078 |
| 37 | 36355510686 |
| 38 | 65539706454 |
| 39 | 99432015478 |
| 40 | 183391807808 |
| 41 | 268568296956 |
| 42 | 513870876498 |
| 43 | 714234719598 |
| 44 | 1440359201368 |
| 45 | 1874047502574 |
| 46 | 4048390833688 |
| 47 | 4791576314698 |
| 48 | 11521319804730 |
| 49 | 11801670105578 |
| 50 | 33055165149064 |
| 51 | 27869200356228 |
| 52 | 96170461301080 |
| 53 | 58847785748014 |
| 54 | 288365269158218 |
| 55 | 97008272891722 |
| 56 | 876853221827434 |
| 57 | 50270991328638 |
| 58 | 2742424862540904 |
| 59 | -723012645772984 |
| 60 | 8945610206297122 |
[2,8,24,62,148,330,710,1464,2962,5814,11288,21406, 40364,74570,137602,249088,451868,804766,1440580, 2529686,4482584,7775166,13664146,23446020, 40953840,69518842,120978656,203223692,352808860, 586473542,1018405966,1671890010,2913173846, 4717224772,8265261498,13170191912,23329646078, 36355510686,65539706454,99432015478,183391807808, 268568296956,513870876498,714234719598, 1440359201368,1874047502574,4048390833688, 4791576314698,11521319804730,11801670105578, 33055165149064,27869200356228,96170461301080, 58847785748014,288365269158218,97008272891722, 876853221827434,50270991328638,2742424862540904, -723012645772984,8945610206297122] |