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A303685 as a simple table

n a(n)
1 0
2 5
3 2
4 20
5 27
6 108
7 191
8 599
9 1261
10 3503
11 8019
12 20956
13 49932
14 126833
15 308197
16 772321
17 1894368
18 4716189
19 11620491
20 28839210
21 71214717
22 176468284
23 436228102
24 1080165740
25 2671530008
26 6612751510
27 16359100711
28 40486188269
29 100169626090

[0,5,2,20,27,108,191,599,1261,3503,8019,20956,
 49932,126833,308197,772321,1894368,4716189,
 11620491,28839210,71214717,176468284,436228102,
 1080165740,2671530008,6612751510,16359100711,
 40486188269,100169626090]

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Last modified December 1 04:32 EST 2021. Contains 349426 sequences. (Running on oeis4.)