A056441 - OEIS

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A056441 as a simple table

n	a(n)
1	1
2	1
3	2
4	5
5	6
6	29
7	28
8	142
9	242
10	1222
11	1664
12	15935
13	18198
14	134452
15	376424
16	1415060
17	2634596
18	26534337
19	33499358
20	287001476
21	727425470
22	3332039278
23	5794658930
24	61120838930
25	93825569002
26	601444720052

[1,1,2,5,6,29,28,142,242,1222,1664,15935,18198, 134452,376424,1415060,2634596,26534337,33499358, 287001476,727425470,3332039278,5794658930, 61120838930,93825569002,601444720052]