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A078343 as a simple table

n a(n)
0 -1
1 2
2 3
3 8
4 19
5 46
6 111
7 268
8 647
9 1562
10 3771
11 9104
12 21979
13 53062
14 128103
15 309268
16 746639
17 1802546
18 4351731
19 10506008
20 25363747
21 61233502
22 147830751
23 356895004
24 861620759
25 2080136522
26 5021893803
27 12123924128
28 29269742059
29 70663408246
30 170596558551

[-1,2,3,8,19,46,111,268,647,1562,3771,9104,21979,
 53062,128103,309268,746639,1802546,4351731,
 10506008,25363747,61233502,147830751,356895004,
 861620759,2080136522,5021893803,12123924128,
 29269742059,70663408246,170596558551]

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Last modified February 23 18:54 EST 2019. Contains 320438 sequences. (Running on oeis4.)