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A316321 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 1
6 4
7 16
8 51
9 158
10 463
11 1330
12 3742
13 10438
14 28877
15 79619
16 218997
17 602079
18 1655623
19 4557604
20 12564084
21 34697544
22 96006605
23 266185703
24 739530680
25 2058786037
26 5742859294
27 16050179897
28 44939957405
29 126052336580
30 354158412141

[0,0,0,0,1,4,16,51,158,463,1330,3742,10438,28877,
 79619,218997,602079,1655623,4557604,12564084,
 34697544,96006605,266185703,739530680,2058786037,
 5742859294,16050179897,44939957405,126052336580,
 354158412141]

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Last modified May 6 10:47 EDT 2024. Contains 372293 sequences. (Running on oeis4.)