A162233 - OEIS

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A162233 as a simple table

n	a(n)
0	1
1	7
2	52
3	433
4	273
5	25639
6	212419
7	2087646
8	13606405
9	40695508
10	637339524
11	6710775966
12	32298119799
13	497577637886
14	268451841
15	1002493281673
16	66627168235658
17	17180000257
18	5190196317533094
19	57033725899507007

[1,7,52,433,273,25639,212419,2087646,13606405, 40695508,637339524,6710775966,32298119799, 497577637886,268451841,1002493281673, 66627168235658,17180000257,5190196317533094, 57033725899507007]