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A301875 as a simple table

n a(n)
0 1
1 1
2 4
3 12
4 30
5 78
6 184
7 448
8 1033
9 2361
10 5292
11 11676
12 25382
13 54470
14 115508
15 242132
16 502520
17 1032632
18 2103172
19 4246948
20 8507968
21 16915536
22 33391788
23 65470332
24 127539321
25 246928233
26 475274592
27 909658536
28 1731703788
29 3279644604
30 6180528236

[1,1,4,12,30,78,184,448,1033,2361,5292,11676,
 25382,54470,115508,242132,502520,1032632,2103172,
 4246948,8507968,16915536,33391788,65470332,
 127539321,246928233,475274592,909658536,
 1731703788,3279644604,6180528236]

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Last modified April 18 22:18 EDT 2024. Contains 371782 sequences. (Running on oeis4.)