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A065525 as a simple table

n a(n)
0 4
1 12
2 52
3 275
4 1539
5 8883
6 51974
7 306464
8 1815791
9 10791313
10 64266028
11 383289080
12 2288430270
13 13674181949
14 81759268145
15 489087871679
16 2926904894187
17 17521456528700
18 104917324472297
19 628377368081285
20 3764220848092978
21 22552713068921032
22 135139349515525416

[4,12,52,275,1539,8883,51974,306464,1815791,
 10791313,64266028,383289080,2288430270,
 13674181949,81759268145,489087871679,
 2926904894187,17521456528700,104917324472297,
 628377368081285,3764220848092978,
 22552713068921032,135139349515525416]

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Last modified January 27 21:49 EST 2023. Contains 359849 sequences. (Running on oeis4.)