A254737 - OEIS

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A254737 as a simple table

n	a(n)
1	2848
2	19782
3	130554
4	795666
5	4613180
6	26334567
7	148992766
8	835291656
9	4658392738
10	25877167367
11	143353076996
12	792328254848
13	4372508061480
14	24098933827502
15	132699992555054
16	730161877826513
17	4015459447103366

[2848,19782,130554,795666,4613180,26334567, 148992766,835291656,4658392738,25877167367, 143353076996,792328254848,4372508061480, 24098933827502,132699992555054,730161877826513, 4015459447103366]