A004058 - OEIS

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A004058 as a simple table

n	a(n)
0	1
1	12
2	99
3	686
4	4305
5	25368
6	143263
7	785202
8	4211229
9	22226204
10	115899147
11	598832598
12	3072304873
13	15676477920
14	79649367351
15	403336249274
16	2037103422837
17	10267399442916
18	51665107485475

[1,12,99,686,4305,25368,143263,785202,4211229, 22226204,115899147,598832598,3072304873, 15676477920,79649367351,403336249274, 2037103422837,10267399442916,51665107485475]