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A002043 as a simple table

n a(n)
2 3
3 0
4 6
5 18
6 40
7 81
8 201
9 414
10 916
11 1899
12 3973
13 8059
14 16402
15 32561
16 64520
17 125986
18 244448
19 469195
20 895077
21 1692143
22 3179406
23 5929721
24 10993373
25 20250589
26 37096872

[3,0,6,18,40,81,201,414,916,1899,3973,8059,16402,
 32561,64520,125986,244448,469195,895077,1692143,
 3179406,5929721,10993373,20250589,37096872]

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Last modified May 27 16:48 EDT 2022. Contains 354110 sequences. (Running on oeis4.)