A278893 - OEIS

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A278893 as a simple table

n	a(n)
1	56
2	389640
3	518626568
4	430110958155
5	273949132717772
6	143827898685401892
7	64434873104394812016
8	25210227731914720632036
9	8773051977547229666591720
10	2756820326309288648206048280
11	792154472658215852314325527168

[56,389640,518626568,430110958155,273949132717772, 143827898685401892,64434873104394812016, 25210227731914720632036,8773051977547229666591720, 2756820326309288648206048280, 792154472658215852314325527168]