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A006728 as a simple table

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]

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Last modified September 20 18:26 EDT 2018. Contains 315240 sequences. (Running on oeis4.)