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A238917 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 0
5 0
6 0
7 26
8 142
9 544
10 1826
11 5651
12 16859
13 49739
14 147605
15 437656
16 1292876
17 3795660
18 11066720
19 32052260
20 92323188
21 264835528
22 757301423
23 2159899295
24 6146377790
25 17454698660
26 49473876635
27 139980358007
28 395414558802
29 1115322187106
30 3141769710776

[0,0,0,0,0,0,0,26,142,544,1826,5651,16859,49739,
 147605,437656,1292876,3795660,11066720,32052260,
 92323188,264835528,757301423,2159899295,
 6146377790,17454698660,49473876635,139980358007,
 395414558802,1115322187106,3141769710776]

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Last modified December 7 09:17 EST 2022. Contains 358654 sequences. (Running on oeis4.)