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A061639 as a simple table

n a(n)
0 0
1 1
2 1
3 1
4 4
5 10
6 28
7 85
8 262
9 829
10 2677
11 8776
12 29143
13 97825
14 331381
15 1131409
16 3889381
17 13450744
18 46764532
19 163357807
20 573064849
21 2018027719
22 7131064045
23 25278463756
24 89866690732
25 320328538033
26 1144591699069
27 4099050204445
28 14710315969696
29 52893571881142

[0,1,1,1,4,10,28,85,262,829,2677,8776,29143,97825,
 331381,1131409,3889381,13450744,46764532,
 163357807,573064849,2018027719,7131064045,
 25278463756,89866690732,320328538033,
 1144591699069,4099050204445,14710315969696,
 52893571881142]

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Last modified April 24 15:57 EDT 2024. Contains 371961 sequences. (Running on oeis4.)