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A177238 as a simple table

n a(n)
0 2
1 10
2 42
3 174
4 718
5 3014
6 12726
7 54054
8 230046
9 980402
10 4177266
11 17789230
12 75680138
13 321616186
14 1365165694
15 5788182178
16 24514575654
17 103720434558
18 438421398326
19 1851566492994
20 7813337317842
21 32946701361962
22 138832416613530

[2,10,42,174,718,3014,12726,54054,230046,980402,
 4177266,17789230,75680138,321616186,1365165694,
 5788182178,24514575654,103720434558,438421398326,
 1851566492994,7813337317842,32946701361962,
 138832416613530]

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Last modified January 26 23:05 EST 2020. Contains 331289 sequences. (Running on oeis4.)