A258526 - OEIS

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A258526 as a simple table

n	a(n)
1	65548
2	523452
3	3133384
4	6505920
5	16029944
6	49299000
7	161983800
8	588975448
9	2269798888
10	8629849032
11	35432952680
12	139330382536
13	579721064488
14	2318409734792
15	9711197085928
16	39208388528968
17	164635715673512

[65548,523452,3133384,6505920,16029944,49299000, 161983800,588975448,2269798888,8629849032, 35432952680,139330382536,579721064488, 2318409734792,9711197085928,39208388528968, 164635715673512]