A025994 - OEIS

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A025994 as a simple table

n	a(n)
0	1
1	24
2	377
3	4932
4	58485
5	654192
6	7053313
7	74243004
8	769050029
9	7880095080
10	80144389689
11	810929347956
12	8176098535333
13	82230655243488
14	825604414181105
15	8279180036642988
16	82954005943360797
17	830676770037792216

[1,24,377,4932,58485,654192,7053313,74243004, 769050029,7880095080,80144389689,810929347956, 8176098535333,82230655243488,825604414181105, 8279180036642988,82954005943360797, 830676770037792216]