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A056128 as a simple table

n a(n)
0 1
1 20
2 174
3 988
4 4277
5 15288
6 47320
7 130832
8 330174
9 772616
10 1696396
11 3527160
12 6995534
13 13312768
14 24426552
15 43385360
16 74847175
17 125777340
18 206390730
19 331405620
20 521690715
21 806403000
22 1225732560
23 1834391520
24 2706007980
25 3938612496
26 5661434520
27 8043259504

[1,20,174,988,4277,15288,47320,130832,330174,
 772616,1696396,3527160,6995534,13312768,24426552,
 43385360,74847175,125777340,206390730,331405620,
 521690715,806403000,1225732560,1834391520,
 2706007980,3938612496,5661434520,8043259504]

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Last modified May 3 07:46 EDT 2024. Contains 372206 sequences. (Running on oeis4.)