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A055608 as a simple table

n a(n)
1 1
2 13
3 92
4 473
5 1982
6 7191
7 23431
8 70234
9 196941
10 522939
11 1327002
12 3240917
13 7660538
14 17602967
15 39466363
16 86593478
17 186399956
18 394478234
19 822229746
20 1690521204
21 3433033150
22 6893852746
23 13702694284
24 26982983126
25 52680389239

[1,13,92,473,1982,7191,23431,70234,196941,522939,
 1327002,3240917,7660538,17602967,39466363,
 86593478,186399956,394478234,822229746,1690521204,
 3433033150,6893852746,13702694284,26982983126,
 52680389239]

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Last modified May 12 03:56 EDT 2021. Contains 343810 sequences. (Running on oeis4.)