A182149 - OEIS

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A182149 as a simple table

n	a(n)
0	0
1	1
2	21
3	196418
4	10610209857723
5	59425114757512643212875125
6	619220451666590135228675387863297874269396512
7	215414832505658809004682396169711233230800418578767753330908886771798637

[0,1,21,196418,10610209857723, 59425114757512643212875125, 619220451666590135228675387863297874269396512, 21541483250565880900468239616971123323080041857876\ 7753330908886771798637]