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A122509 as a simple table

n a(n)
0 0
1 1
2 0
3 2
4 21
5 4
6 84
7 449
8 252
9 2662
10 9933
11 10616
12 75768
13 229825
14 374472
15 2050778
16 5575269
17 11965468
18 54216876
19 141011585
20 359708580
21 1420577566
22 3680660445
23 10395035312
24 37193449776
25 98083939969
26 292682641104
27 977230325234

[0,1,0,2,21,4,84,449,252,2662,9933,10616,75768,
 229825,374472,2050778,5575269,11965468,54216876,
 141011585,359708580,1420577566,3680660445,
 10395035312,37193449776,98083939969,292682641104,
 977230325234]

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Last modified April 23 06:04 EDT 2024. Contains 371906 sequences. (Running on oeis4.)