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A278875 as a simple table

n a(n)
0 1
1 1
2 7
3 50
4 311
5 1954
6 11914
7 76003
8 467221
9 2943211
10 18261840
11 114360149
12 712196192
13 4449548684
14 27749537725
15 173227638835
16 1080825788517
17 6745415139188
18 42092502492537
19 262680587755837
20 1639226363457986
21 10229514197548963
22 63836523795617745

[1,1,7,50,311,1954,11914,76003,467221,2943211,
 18261840,114360149,712196192,4449548684,
 27749537725,173227638835,1080825788517,
 6745415139188,42092502492537,262680587755837,
 1639226363457986,10229514197548963,
 63836523795617745]

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Last modified April 24 20:06 EDT 2024. Contains 371963 sequences. (Running on oeis4.)