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A149409 as a simple table

n a(n)
0 1
1 1
2 4
3 12
4 52
5 197
6 847
7 3606
8 15852
9 70792
10 319238
11 1458059
12 6712464
13 31103382
14 145188780
15 680497081
16 3206436620
17 15163714935
18 71961913140
19 342618244047
20 1635473805211
21 7827051661123
22 37540855568739
23 180418046385308
24 868696755339059
25 4189558069863009
26 20236887246198359
27 97887835211194854

[1,1,4,12,52,197,847,3606,15852,70792,319238,
 1458059,6712464,31103382,145188780,680497081,
 3206436620,15163714935,71961913140,342618244047,
 1635473805211,7827051661123,37540855568739,
 180418046385308,868696755339059,4189558069863009,
 20236887246198359,97887835211194854]

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Last modified April 19 23:15 EDT 2024. Contains 371798 sequences. (Running on oeis4.)