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A027153 as a simple table

n a(n)
0 1
1 4
2 11
3 32
4 77
5 212
6 503
7 1376
8 3257
9 8900
10 21059
11 57536
12 136133
13 371924
14 879983
15 2404160
16 5688305
17 15540740
18 36769787
19 100456928
20 237683645
21 649363796
22 1536411239
23 4197553568
24 9931518377
25 27133412804
26 64198343987

[1,4,11,32,77,212,503,1376,3257,8900,21059,57536,
 136133,371924,879983,2404160,5688305,15540740,
 36769787,100456928,237683645,649363796,1536411239,
 4197553568,9931518377,27133412804,64198343987]

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Last modified January 21 12:13 EST 2022. Contains 350477 sequences. (Running on oeis4.)