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A000638 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 11
5 19
6 56
7 96
8 296
9 554
10 1593
11 3094
12 10723
13 20832
14 75154
15 159129
16 686165
17 1466358
18 7274651 

[1,1,2,4,11,19,56,96,296,554,1593,3094,10723,
 20832,75154,159129,686165,1466358,7274651]

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Last modified May 13 16:16 EDT 2024. Contains 372522 sequences. (Running on oeis4.)