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A015457 as a simple table

n a(n)
0 1
1 1
2 12
3 133
4 1475
5 16358
6 181413
7 2011901
8 22312324
9 247447465
10 2744234439
11 30434026294
12 337518523673
13 3743137786697
14 41512034177340
15 460375513737437
16 5105642685289147
17 56622445051918054
18 627952538256387741
19 6964100365872183205
20 77233056562850402996

[1,1,12,133,1475,16358,181413,2011901,22312324,
 247447465,2744234439,30434026294,337518523673,
 3743137786697,41512034177340,460375513737437,
 5105642685289147,56622445051918054,
 627952538256387741,6964100365872183205,
 77233056562850402996]

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Last modified January 28 00:32 EST 2020. Contains 331313 sequences. (Running on oeis4.)