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A109655 as a simple table

n a(n)
0 1
1 1
2 3
3 8
4 33
5 141
6 676
7 3370
8 17575
9 94257
10 517971
11 2900900
12 16509188
13 95220378
14 555546058
15 3273480400
16 19456066175
17 116521302221
18 702567455381
19 4261765991164
20 25992285913221
21 159303547578873
22 980701254662294
23 6061894625462492
24 37609015174472628

[1,1,3,8,33,141,676,3370,17575,94257,517971,
 2900900,16509188,95220378,555546058,3273480400,
 19456066175,116521302221,702567455381,
 4261765991164,25992285913221,159303547578873,
 980701254662294,6061894625462492,
 37609015174472628]

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Last modified October 16 05:23 EDT 2019. Contains 328043 sequences. (Running on oeis4.)