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A068313 as a simple table

n a(n)
1 1
2 4
3 15
4 82
5 457
6 3231
7 24055
8 209375
9 1955288
10 20455936
11 229830841
12 2828166755
13 37228913365
14 528635368980
15 7990596990430
16 128909374528433
17 2202090635802581
18 39837079499488151
19 759320365206705013
20 15234890522990662422
21 320634889654149218205
22 7068984425261215971205

[1,4,15,82,457,3231,24055,209375,1955288,20455936,
 229830841,2828166755,37228913365,528635368980,
 7990596990430,128909374528433,2202090635802581,
 39837079499488151,759320365206705013,
 15234890522990662422,320634889654149218205,
 7068984425261215971205]

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Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)