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A002028 as a simple table

n a(n)
0 1
1 3
2 6
3 42
4 618
5 15990
6 668526
7 43558242
8 4373213298
9 677307561630
10 162826875512646
11 61183069270120842
12 36134310487980825258
13 33673533885068169649830
14 49646105434209446798290206
15 116002075479856331220877149042
16 430053223599741677879550609246498
17 2531493110297317758855120762121050990

[1,3,6,42,618,15990,668526,43558242,4373213298,
 677307561630,162826875512646,61183069270120842,
 36134310487980825258,33673533885068169649830,
 49646105434209446798290206,
 116002075479856331220877149042,
 430053223599741677879550609246498,
 2531493110297317758855120762121050990]

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Last modified April 16 12:52 EDT 2024. Contains 371711 sequences. (Running on oeis4.)