A274264 - OEIS

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A274264 as a simple table

n	a(n)
1	3
2	33
3	308
4	3050
5	30405
6	303979
7	3039648
8	30396356
9	303963597
10	3039635407
11	30396354916
12	303963551200
13	3039635509025
14	30396355093247
15	303963550927371
16	3039635509273730
17	30396355092701463
18	303963550927001730

[3,33,308,3050,30405,303979,3039648,30396356, 303963597,3039635407,30396354916,303963551200, 3039635509025,30396355093247,303963550927371, 3039635509273730,30396355092701463, 303963550927001730]