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A227122 as a simple table

n a(n)
1 4
2 13
3 33
4 81
5 202
6 492
7 1143
8 2524
9 5315
10 10718
11 20776
12 38839
13 70225
14 123134
15 209884
16 348550
17 565100
18 896136
19 1392363
20 2122925
21 3180764
22 4689176
23 6809757
24 9751952
25 13784441
26 19248618
27 26574442
28 36298963
29 49087851
30 65760282
31 87317562

[4,13,33,81,202,492,1143,2524,5315,10718,20776,
 38839,70225,123134,209884,348550,565100,896136,
 1392363,2122925,3180764,4689176,6809757,9751952,
 13784441,19248618,26574442,36298963,49087851,
 65760282,87317562]

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Last modified June 24 22:23 EDT 2019. Contains 324337 sequences. (Running on oeis4.)