A254776 - OEIS

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A254776 as a simple table

n	a(n)
1	2630
2	11321
3	50173
4	207006
5	876483
6	3931849
7	17766805
8	80755741
9	371133499
10	1709570292
11	7888129452
12	36437414874
13	168400742824
14	778428650323
15	3598875856069
16	16639899151437
17	76939511613102
18	355761482032982

[2630,11321,50173,207006,876483,3931849,17766805, 80755741,371133499,1709570292,7888129452, 36437414874,168400742824,778428650323, 3598875856069,16639899151437,76939511613102, 355761482032982]