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A305407 as a simple table

n a(n)
0 1
1 1
2 5
3 32
4 274
5 2939
6 37833
7 568210
8 9753280
9 188342949
10 4041170695
11 95380234366
12 2455830637412
13 68501591450447
14 2057726452045145
15 66227424015265178
16 2273614433910697920
17 82932491842062712873
18 3202994529476330549163
19 130577628147690206429038
20 5603479009890212632226756

[1,1,5,32,274,2939,37833,568210,9753280,188342949,
 4041170695,95380234366,2455830637412,
 68501591450447,2057726452045145,66227424015265178,
 2273614433910697920,82932491842062712873,
 3202994529476330549163,130577628147690206429038,
 5603479009890212632226756]

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Last modified February 26 16:33 EST 2020. Contains 332284 sequences. (Running on oeis4.)