A203725 - OEIS

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A203725 as a simple table

n	a(n)
1	2278
2	12470
3	58048
4	230014
5	808455
6	2572189
7	7508980
8	20395251
9	51998196
10	125414516
11	287825519
12	631806642
13	1332124235
14	2708040628
15	5324902859
16	10157044643
17	18841255222
18	34065603378
19	60151407191
20	103913751089

[2278,12470,58048,230014,808455,2572189,7508980, 20395251,51998196,125414516,287825519,631806642, 1332124235,2708040628,5324902859,10157044643, 18841255222,34065603378,60151407191,103913751089]