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A268761 as a simple table

n a(n)
1 2
2 15
3 56
4 223
5 762
6 2607
7 8500
8 27411
9 86622
10 270955
11 838224
12 2573015
13 7841538
14 23759463
15 71619436
16 214933915
17 642504870
18 1914023267
19 5684288136
20 16834582623
21 49732758858
22 146587890015
23 431177727396
24 1265883329827
25 3710027613934

[2,15,56,223,762,2607,8500,27411,86622,270955,
 838224,2573015,7841538,23759463,71619436,
 214933915,642504870,1914023267,5684288136,
 16834582623,49732758858,146587890015,431177727396,
 1265883329827,3710027613934]

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Last modified January 28 10:39 EST 2023. Contains 359859 sequences. (Running on oeis4.)