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A000903 as a simple table

n a(n)
1 1
2 1
3 2
4 7
5 23
6 115
7 694
8 5282
9 46066
10 456454
11 4999004
12 59916028
13 778525516
14 10897964660
15 163461964024
16 2615361578344
17 44460982752488
18 800296985768776
19 15205638776753680
20 304112757426239984
21 6386367801916347184

[1,1,2,7,23,115,694,5282,46066,456454,4999004,
 59916028,778525516,10897964660,163461964024,
 2615361578344,44460982752488,800296985768776,
 15205638776753680,304112757426239984,
 6386367801916347184]

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Last modified March 28 13:25 EDT 2024. Contains 371254 sequences. (Running on oeis4.)