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A028530 as a simple table

n a(n)
0 1
1 0
2 273
3 1225
4 6699
5 24276
6 83727
7 249273
8 706251
9 1849449
10 4634679
11 11043102
12 25418694
13 56429226
14 121771023
15 255577105
16 524104602
17 1051048467
18 2067033325
19 3990581847
20 7577271786
21 14163504079
22 26096985684
23 47437304901
24 85152306694
25 151047652140
26 264977541885

[1,0,273,1225,6699,24276,83727,249273,706251,
 1849449,4634679,11043102,25418694,56429226,
 121771023,255577105,524104602,1051048467,
 2067033325,3990581847,7577271786,14163504079,
 26096985684,47437304901,85152306694,151047652140,
 264977541885]

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Last modified March 29 10:22 EDT 2024. Contains 371268 sequences. (Running on oeis4.)