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A209068 as a simple table

n a(n)
1 1
2 4
3 12
4 57
5 276
6 1465
7 8008
8 45408
9 263168
10 1554582
11 9318412
12 56549840
13 346717662
14 2144555617
15 13365472929
16 83848948043
17 529091046781
18 3355802952070

[1,4,12,57,276,1465,8008,45408,263168,1554582,
 9318412,56549840,346717662,2144555617,13365472929,
 83848948043,529091046781,3355802952070]

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Last modified May 24 00:15 EDT 2022. Contains 353993 sequences. (Running on oeis4.)