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A148133 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 11
5 28
6 79
7 232
8 736
9 2295
10 7511
11 25302
12 86950
13 300370
14 1065759
15 3839576
16 13953744
17 51197935
18 190807055
19 717234202
20 2712764266
21 10353167908
22 39891162812
23 154541802382
24 602000096362
25 2362123596696
26 9324852880747
27 36963162522470
28 147246486670901
29 589797809248183
30 2372248128513882

[1,1,2,4,11,28,79,232,736,2295,7511,25302,86950,
 300370,1065759,3839576,13953744,51197935,
 190807055,717234202,2712764266,10353167908,
 39891162812,154541802382,602000096362,
 2362123596696,9324852880747,36963162522470,
 147246486670901,589797809248183,2372248128513882]

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Last modified September 25 00:48 EDT 2020. Contains 337333 sequences. (Running on oeis4.)