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A151472 as a simple table

n a(n)
0 1
1 1
2 3
3 9
4 30
5 110
6 423
7 1687
8 6984
9 29574
10 128074
11 564652
12 2527292
13 11463972
14 52602015
15 243824807
16 1140448152
17 5377337150
18 25539196048
19 122093592944
20 587170555168
21 2839207157456
22 13797304069674
23 67357039620092
24 330225541717108
25 1625329978935340
26 8028874036140468
27 39796190100237612

[1,1,3,9,30,110,423,1687,6984,29574,128074,564652,
 2527292,11463972,52602015,243824807,1140448152,
 5377337150,25539196048,122093592944,587170555168,
 2839207157456,13797304069674,67357039620092,
 330225541717108,1625329978935340,8028874036140468,
 39796190100237612]

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Last modified January 22 12:13 EST 2019. Contains 319363 sequences. (Running on oeis4.)