A021229 - OEIS

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A021229 as a simple table

n	a(n)
0	1
1	19
2	248
3	2786
4	28983
5	288273
6	2786566
7	26424112
8	247232645
9	2291004287
10	21080414004
11	192953358078
12	1759187655187
13	15990940940461
14	145026232803362
15	1312990445670284
16	11871194464243809
17	107220713350935195

[1,19,248,2786,28983,288273,2786566,26424112, 247232645,2291004287,21080414004,192953358078, 1759187655187,15990940940461,145026232803362, 1312990445670284,11871194464243809, 107220713350935195]