A210855 - OEIS

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A210855 as a simple table

n	a(n)
1	4
2	46
3	1139
4	55516
5	5327304
6	1010944060
7	380704421087
8	285205710360936
9	425825333933157003
10	1268871858354238286927
11	7554384371145384136117854
12	89942576436863983961350601461
13	2143078341798100623746679385130235

[4,46,1139,55516,5327304,1010944060,380704421087, 285205710360936,425825333933157003, 1268871858354238286927,7554384371145384136117854, 89942576436863983961350601461, 2143078341798100623746679385130235]