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A256125 as a simple table

n a(n)
0 1
1 1
2 3
3 12
4 67
5 457
6 3734
7 35741
8 392875
9 4886114
10 67924417
11 1044531625
12 17609980356
13 322993544751
14 6402464186243
15 136373115537072
16 3105809328600351
17 75300018326324541
18 1936106590359322126
19 52615058519875702993
20 1506721174739412743551

[1,1,3,12,67,457,3734,35741,392875,4886114,
 67924417,1044531625,17609980356,322993544751,
 6402464186243,136373115537072,3105809328600351,
 75300018326324541,1936106590359322126,
 52615058519875702993,1506721174739412743551]

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Last modified June 16 10:30 EDT 2021. Contains 345056 sequences. (Running on oeis4.)