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A070764 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 1
10 4
11 25
12 108
13 450
14 1713
15 6267
16 21988
17 75185
18 251590
19 828408
20 2692630
21 8661287
22 27624040
23 87479663
24 275392248
25 862593661
26 2690285608
27 8359581585
28 25893044920
29 79978118632
30 246433568617

[0,0,0,0,0,0,0,0,1,4,25,108,450,1713,6267,21988,
 75185,251590,828408,2692630,8661287,27624040,
 87479663,275392248,862593661,2690285608,
 8359581585,25893044920,79978118632,246433568617]

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Last modified May 7 17:41 EDT 2024. Contains 372312 sequences. (Running on oeis4.)