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A217057 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 1
5 12
6 102
7 770
8 5545
9 39220
10 276144
11 1948212
12 13817680
13 98679990
14 710108396
15 5150076076
16 37641647410
17 277202062666
18 2056218941678
19 15358296210724
20 115469557503753
21 873561194459596
22 6647760790457218
23 50871527629923754
24 391345137795371013

[0,0,0,0,1,12,102,770,5545,39220,276144,1948212,
 13817680,98679990,710108396,5150076076,
 37641647410,277202062666,2056218941678,
 15358296210724,115469557503753,873561194459596,
 6647760790457218,50871527629923754,
 391345137795371013]

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Last modified April 23 03:30 EDT 2024. Contains 371906 sequences. (Running on oeis4.)