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A056117 as a simple table

n a(n)
0 1
1 17
2 117
3 525
4 1815
5 5247
6 13299
7 30459
8 64350
9 127270
10 238238
11 425646
12 730626
13 1211250
14 1947690
15 3048474
16 4657983
17 6965343
18 10214875
19 14718275
20 20868705
21 29156985
22 40190085
23 54712125
24 73628100
25 98030556
26 129229452
27 168785452

[1,17,117,525,1815,5247,13299,30459,64350,127270,
 238238,425646,730626,1211250,1947690,3048474,
 4657983,6965343,10214875,14718275,20868705,
 29156985,40190085,54712125,73628100,98030556,
 129229452,168785452]

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Last modified January 22 20:00 EST 2022. Contains 350504 sequences. (Running on oeis4.)