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A180907 as a simple table

n a(n)
1 1
2 3
3 11
4 42
5 163
6 639
7 2520
8 9976
9 39595
10 157441
11 626859
12 2498318
13 9964308
14 39764292
15 158756360
16 634044576
17 2532959099
18 10121210373
19 40449588625
20 161680869046
21 646330342699
22 2584001013295
23 10331554755044
24 41311180250504

[1,3,11,42,163,639,2520,9976,39595,157441,626859,
 2498318,9964308,39764292,158756360,634044576,
 2532959099,10121210373,40449588625,161680869046,
 646330342699,2584001013295,10331554755044,
 41311180250504]

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Last modified January 26 16:58 EST 2020. Contains 331280 sequences. (Running on oeis4.)