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A037649 as a simple table

n a(n)
1 3
2 21
3 148
4 1039
5 7273
6 50912
7 356387
8 2494709
9 17462964
10 122240751
11 855685257
12 5989796800
13 41928577603
14 293500043221
15 2054500302548
16 14381502117839
17 100670514824873
18 704693603774112
19 4932855226418787

[3,21,148,1039,7273,50912,356387,2494709,17462964,
 122240751,855685257,5989796800,41928577603,
 293500043221,2054500302548,14381502117839,
 100670514824873,704693603774112,4932855226418787]

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Last modified December 8 20:37 EST 2021. Contains 349596 sequences. (Running on oeis4.)