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A019441 as a simple table

n a(n)
1 1
2 2
3 28
4 244
5 1680
6 10214
7 57476
8 305476
9 1553632
10 7641218
11 36608932
12 171666468
13 790650724
14 3586822020
15 16062938368
16 71135451440
17 311964025352
18 1356392904818
19 5852609697844
20 25081266854732

[1,2,28,244,1680,10214,57476,305476,1553632,
 7641218,36608932,171666468,790650724,3586822020,
 16062938368,71135451440,311964025352,
 1356392904818,5852609697844,25081266854732]

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)