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A200051 as a simple table

n a(n)
1 1
2 4
3 10
4 26
5 68
6 178
7 472
8 1276
9 3462
10 9496
11 26024
12 71956
13 198740
14 552814
15 1535556
16 4290252
17 11968194
18 33553214
19 93917400
20 264020106
21 741024426
22 2087799972
23 5872999754
24 16577458520
25 46720454112
26 132081262316
27 372843051320

[1,4,10,26,68,178,472,1276,3462,9496,26024,71956,
 198740,552814,1535556,4290252,11968194,33553214,
 93917400,264020106,741024426,2087799972,
 5872999754,16577458520,46720454112,132081262316,
 372843051320]

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Last modified December 8 03:17 EST 2021. Contains 349590 sequences. (Running on oeis4.)