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A218782 as a simple table

n a(n)
1 2
2 12
3 52
4 216
5 872
6 3496
7 14024
8 56200
9 224904
10 899720
11 3599496
12 14398600
13 57599112
14 230398088
15 921606280
16 3686471816
17 14745933960
18 58983782536
19 235935438984
20 943742064776
21 3774970665096
22 15099883493512
23 60399541098632
24 241598171519112
25 966392760309896

[2,12,52,216,872,3496,14024,56200,224904,899720,
 3599496,14398600,57599112,230398088,921606280,
 3686471816,14745933960,58983782536,235935438984,
 943742064776,3774970665096,15099883493512,
 60399541098632,241598171519112,966392760309896]

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Last modified January 18 20:57 EST 2019. Contains 319282 sequences. (Running on oeis4.)