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A148870 as a simple table

n a(n)
0 1
1 1
2 3
3 8
4 29
5 94
6 345
7 1279
8 5059
9 19688
10 79177
11 322253
12 1334084
13 5547509
14 23402949
15 99466276
16 425275371
17 1829109184
18 7928585175
19 34530360916
20 150984395695
21 663332004284
22 2927093664726
23 12956211856289
24 57535449125651
25 256405536186925
26 1145894330679809
27 5133168091473457
28 23054569551952657

[1,1,3,8,29,94,345,1279,5059,19688,79177,322253,
 1334084,5547509,23402949,99466276,425275371,
 1829109184,7928585175,34530360916,150984395695,
 663332004284,2927093664726,12956211856289,
 57535449125651,256405536186925,1145894330679809,
 5133168091473457,23054569551952657]

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Last modified October 27 06:09 EDT 2020. Contains 338035 sequences. (Running on oeis4.)