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A014537 as a simple table

n a(n)
1 4
2 31
3 227
4 1674
5 12367
6 91380
7 675214
8 4989191
9 36865412
10 272400600
11 2012783315
12 14872568831
13 109894245429
14 812014744422
15 6000022499693
16 44334502845080
17 327590128640500
18 2420581837980561
19 17885814992891026

[4,31,227,1674,12367,91380,675214,4989191,
 36865412,272400600,2012783315,14872568831,
 109894245429,812014744422,6000022499693,
 44334502845080,327590128640500,2420581837980561,
 17885814992891026]

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Last modified August 17 11:01 EDT 2019. Contains 326057 sequences. (Running on oeis4.)