A125329 - OEIS

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A125329 as a simple table

n	a(n)
0	1
1	19
2	121
3	619
4	3697
5	22389
6	138973
7	874277
8	5559985
9	35648953
10	230069191
11	1492690207
12	9727027549
13	63617931357
14	417371683689
15	2745447557409
16	18100412004049
17	119567904627743
18	791186114040565
19	5243056748156375

[1,19,121,619,3697,22389,138973,874277,5559985, 35648953,230069191,1492690207,9727027549, 63617931357,417371683689,2745447557409, 18100412004049,119567904627743,791186114040565, 5243056748156375]