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A001336 as a simple table

n a(n)
0 1
1 12
2 132
3 1404
4 14700
5 152532
6 1573716
7 16172148
8 165697044
9 1693773924
10 17281929564
11 176064704412
12 1791455071068
13 18208650297396
14 184907370618612
15 1876240018679868
16 19024942249966812
17 192794447005403916
18 1952681556794601732
19 19767824914170222996 

[1,12,132,1404,14700,152532,1573716,16172148,
 165697044,1693773924,17281929564,176064704412,
 1791455071068,18208650297396,184907370618612,
 1876240018679868,19024942249966812,
 192794447005403916,1952681556794601732,
 19767824914170222996]

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Last modified May 15 13:23 EDT 2024. Contains 372540 sequences. (Running on oeis4.)