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A241690 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 0
10 0
11 0
12 0
13 0
14 0
15 0
16 0
17 0
18 8
19 24
20 80
21 206
22 504
23 1004
24 1910
25 3380
26 5688
27 9036
28 14106
29 21190
30 31158
31 44370
32 62206
33 85308
34 115662
35 153746
36 202146
37 262156
38 336960
39 427488
40 538690
41 671604
42 831926
43 1021238
44 1246604
45 1510056
46 1820580
47 2179480

[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,24,80,206,
 504,1004,1910,3380,5688,9036,14106,21190,31158,
 44370,62206,85308,115662,153746,202146,262156,
 336960,427488,538690,671604,831926,1021238,
 1246604,1510056,1820580,2179480]

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Last modified June 30 10:10 EDT 2024. Contains 373866 sequences. (Running on oeis4.)