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A120948 as a simple table

n a(n)
0 2
1 16
2 50
3 176
4 738
5 3408
6 16402
7 80368
8 397250
9 1972880
10 9824754
11 49005360
12 244672162
13 1222297552
14 6108298706
15 30531927152
16 152630937474
17 763068593424
18 3815084686258
19 19074648589744
20 95370918425186
21 476847618556496

[2,16,50,176,738,3408,16402,80368,397250,1972880,
 9824754,49005360,244672162,1222297552,6108298706,
 30531927152,152630937474,763068593424,
 3815084686258,19074648589744,95370918425186,
 476847618556496]

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Last modified October 16 20:55 EDT 2019. Contains 328103 sequences. (Running on oeis4.)