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A026960 as a simple table

n a(n)
0 1
1 3
2 10
3 30
4 78
5 189
6 440
7 999
8 2230
9 4917
10 10740
11 23283
12 50162
13 107505
14 229360
15 487407
16 1032174
17 2179053
18 4587500
19 9633771
20 20185066
21 42205161
22 88080360
23 183500775
24 381681638
25 792723429
26 1644167140
27 3405774819
28 7046430690
29 14562623457
30 30064771040

[1,3,10,30,78,189,440,999,2230,4917,10740,23283,
 50162,107505,229360,487407,1032174,2179053,
 4587500,9633771,20185066,42205161,88080360,
 183500775,381681638,792723429,1644167140,
 3405774819,7046430690,14562623457,30064771040]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)