A022412 - OEIS

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A022412 as a simple table

n	a(n)
0	1
1	23
2	356
3	4690
4	57015
5	663621
6	7538098
7	84446336
8	938561525
9	10384529155
10	114604142016
11	1262952525198
12	13906624731091
13	153059279644385
14	1684178151097070
15	18529154259093436
16	203840055167045073

[1,23,356,4690,57015,663621,7538098,84446336, 938561525,10384529155,114604142016,1262952525198, 13906624731091,153059279644385,1684178151097070, 18529154259093436,203840055167045073]