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A149486 as a simple table

n a(n)
0 1
1 1
2 4
3 13
4 59
5 237
6 1117
7 4876
8 23484
9 107063
10 521987
11 2442075
12 11995134
13 57056591
14 281598695
15 1354666528
16 6707399025
17 32526399379
18 161411737737
19 787355791682
20 3913582816735
21 19175058749533
22 95424679112641
23 469146070330091
24 2336818911143639
25 11519647002903261
26 57419336864686471
27 283663564494396519

[1,1,4,13,59,237,1117,4876,23484,107063,521987,
 2442075,11995134,57056591,281598695,1354666528,
 6707399025,32526399379,161411737737,787355791682,
 3913582816735,19175058749533,95424679112641,
 469146070330091,2336818911143639,
 11519647002903261,57419336864686471,
 283663564494396519]

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Last modified August 16 07:50 EDT 2022. Contains 356160 sequences. (Running on oeis4.)