A026324 - OEIS

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A026324 as a simple table

n	a(n)
0	1
1	23
2	341
3	4147
4	45045
5	455091
6	4373797
7	40541699
8	365712149
9	3230463379
10	28067769093
11	240654781731
12	2041291828213
13	17162300683187
14	143239714105829
15	1188212150789443
16	9805989936743637
17	80575358596047315

[1,23,341,4147,45045,455091,4373797,40541699, 365712149,3230463379,28067769093,240654781731, 2041291828213,17162300683187,143239714105829, 1188212150789443,9805989936743637, 80575358596047315]