A357271 - OEIS

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A357271 as a simple table

n	a(n)
1	1
2	2
3	3
4	10
5	16
6	48
7	71
8	268
9	330
10	1000
11	1231
12	6472
13	6720
14	20176
15	25011
16	195472
17	200832
18	456300
19	637336
20	3419680
21	3506880
22	11221136
23	15481956
24	126112960
25	127885440
26	262860800
27	384418176
28	2000043808

[1,2,3,10,16,48,71,268,330,1000,1231,6472,6720, 20176,25011,195472,200832,456300,637336,3419680, 3506880,11221136,15481956,126112960,127885440, 262860800,384418176,2000043808]