A209824 - OEIS

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A209824 as a simple table

n	a(n)
1	218
2	4418
3	90000
4	1842509
5	37744836
6	773359089
7	15846003427
8	324684577671
9	6652797311199
10	136316077450664
11	2793121983572647
12	57231184269590694
13	1172669322792974754
14	24028042740488215416
15	492335585844232823766

[218,4418,90000,1842509,37744836,773359089, 15846003427,324684577671,6652797311199, 136316077450664,2793121983572647, 57231184269590694,1172669322792974754, 24028042740488215416,492335585844232823766]